Known transiters:

CoRoT-1 b

CoRoT-10 b

CoRoT-11 b

CoRoT-12 b

CoRoT-13 b

CoRoT-17 b

CoRoT-18 b

CoRoT-19 b

CoRoT-2 b

CoRoT-20 b

CoRoT-3 b

CoRoT-4 b

CoRoT-5 b

CoRoT-6 b

CoRoT-8 b

CoRoT-9 b

EPIC 218916923 b

EPIC-203771098 b

EPIC-203771098 c

EPIC-210957318 b

EPIC-211089792 b

EPIC-212110888 b

GJ1214 b

GJ3470 b

GJ436 b

HAT-P-1 b

HAT-P-10/WASP-11 b

HAT-P-11 b

HAT-P-12 b

HAT-P-13 b

HAT-P-14 b

HAT-P-15 b

HAT-P-16 b

HAT-P-17 b

HAT-P-18 b

HAT-P-19 b

HAT-P-2 b

HAT-P-20 b

HAT-P-21 b

HAT-P-22 b

HAT-P-23 b

HAT-P-24 b

HAT-P-25 b

HAT-P-26 b

HAT-P-27/WASP-40 b

HAT-P-28 b

HAT-P-29 b

HAT-P-3 b

HAT-P-30/WASP-51 b

HAT-P-31 b

HAT-P-32 b

HAT-P-33 b

HAT-P-34 b

HAT-P-35 b

HAT-P-36 b

HAT-P-37 b

HAT-P-38 b

HAT-P-39 b

HAT-P-4 b

HAT-P-40 b

HAT-P-41 b

HAT-P-42 b

HAT-P-43 b

HAT-P-44 b

HAT-P-45 b

HAT-P-46 b

HAT-P-49 b

HAT-P-5 b

HAT-P-50 b

HAT-P-51 b

HAT-P-52 b

HAT-P-53 b

HAT-P-54 b

HAT-P-55 b

HAT-P-56 b

HAT-P-57 b

HAT-P-6 b

HAT-P-65 b

HAT-P-66 b

HAT-P-67 b

HAT-P-7 b

HAT-P-8 b

HAT-P-9 b

HATS-1 b

HATS-11 b

HATS-12 b

HATS-18 b

HATS-19 b

HATS-20 b

HATS-21 b

HATS-22 b

HATS-23 b

HATS-24 b

HATS-25 b

HATS-26 b

HATS-27 b

HATS-28 b

HATS-29 b

HATS-30 b

HATS-31 b

HATS-32 b

HATS-33 b

HATS-34 b

HATS-35 b

HATS-5 b

HATS-6 b

HATS-P-7 b

HD149026 b

HD17156 b

HD189733 b

HD209458 b

HD80606 b

HD97658 b

KELT-1 b

KELT-10 b

KELT-11 b

KELT-15 b

KELT-16 b

KELT-17 b


KELT-3 b


KELT-6 b

KELT-7 b

KELT-8 b

Kepler-10 c

Kepler-11 c

Kepler-11 d

Kepler-11 e

Kepler-11 f

Kepler-11 g

Kepler-12 b

Kepler-14 b

Kepler-15 b

Kepler-16A b

Kepler-16B b

Kepler-17 b

Kepler-18 d

Kepler-18 c

Kepler-19 b

Kepler-20 d

Kepler-20 c

Kepler-4 b

Kepler-448 b

Kepler-5 b

Kepler-6 b

Kepler-7 b

Kepler-8 b

Kepler-9 b

Kepler-9 c

KOI 0135 b

KOI 0196 b

KOI 0204 b

KOI 0428 b


OGLE-TR-10 b

OGLE-TR-111 b

OGLE-TR-113 b

OGLE-TR-132 b

OGLE-TR-182 b

OGLE-TR-211 b

OGLE-TR-56 b


Qatar-1 b

Qatar-2 b

Qatar-3 b

Qatar-4 b

Qatar-5 b

TrES-1 b

TrES-2 b

TrES-3 b

TrES-4 b

TrES-5 b

WASP-1 b

WASP-10 b

WASP-100 b

WASP-101 b

WASP-102 b

WASP-103 b

WASP-104 b

WASP-105 b

WASP-106 b

WASP-107 b

WASP-108 b

WASP-109 b

WASP-110 b

WASP-111 b

WASP-112 b

WASP-113 b

WASP-114 b

WASP-117 b

WASP-118 b

WASP-119 b

WASP-12 b

WASP-120 b

WASP-121 b

WASP-122 b

WASP-123 b

WASP-124 b

WASP-126 b

WASP-127 b

WASP-129 b

WASP-13 b

WASP-130 b

WASP-131 b

WASP-132 b

WASP-133 b

WASP-136 b

WASP-138 b

WASP-139 b

WASP-14 b

WASP-140 b

WASP-141 b

WASP-142 b

WASP-15 b

WASP-157 b

WASP-16 b

WASP-17 b

WASP-18 b

WASP-19 b

WASP-2 b

WASP-20 b

WASP-21 b

WASP-22 b

WASP-23 b

WASP-24 b

WASP-25 b

WASP-26 b

WASP-28 b

WASP-29 b

WASP-3 b

WASP-31 b

WASP-32 b

WASP-33 b

WASP-34 b

WASP-35 b

WASP-36 b

WASP-37 b

WASP-38 b

WASP-39 b

WASP-4 b

WASP-41 b

WASP-42 b

WASP-43 b

WASP-44 b

WASP-45 b

WASP-46 b

WASP-47 b

WASP-48 b

WASP-49 b

WASP-5 b

WASP-50 b

WASP-52 b

WASP-54 b

WASP-55 b

WASP-56 b

WASP-57 b

WASP-58 b

WASP-59 b

WASP-6 b

WASP-60 b

WASP-61 b

WASP-62 b

WASP-63 b

WASP-64 b

WASP-65 b

WASP-66 b

WASP-67 b

WASP-68 b

WASP-69 b

WASP-7 b

WASP-70A b

WASP-71 b

WASP-72 b

WASP-73 b

WASP-74 b

WASP-75 b

WASP-76 b

WASP-77 b

WASP-78 b

WASP-79 b

WASP-8 b

WASP-80 b

WASP-82 b

WASP-83 b

WASP-84 b

WASP-85A b

WASP-86/Kelt-12 b

WASP-87 b

WASP-88 b

WASP-89 b

WASP-90 b

WASP-91 b

WASP-92 b

WASP-93 b

WASP-94A b

WASP-95 b

WASP-96 b

WASP-97 b

WASP-98 b

WASP-99 b

WD 1145+017 b

XO-1 b

XO-2 b

XO-3 b

XO-4 b

XO-5 b

XO-6 b





ETD - Exoplanet Transit Database

Observers community | How to contribute to ETD | Model-fit your data | Transit predictions |
KEPLER Transit predictions | KEPLER Candidates

Archive of news and updates


2014-11-24 : Dear observers,

on 29/11 - 3/12 2014 will be a planned ETD blackout. ETD will be moved to a new server. In these days all ETD services will not work. If you need a transit prediction for this period use the prediction service before 28th November (transits predictions are generated 30 days to the future)..

We are looking forward your new transit light curves after the 3rd December.

ETD admins

2013-02-24 : Upgrade of transit predictions.
We have made a small improvement of transit predictions. In the table there are displaying HJD times for predicted transit (begin, mid, end).

2012-11-16 : nová tranzitujúca exoplaneta nedávno publikovaná byla přidána do ETD: WASP-71b

2012-11-12 : 5 tranzitujících exoplanet nedávno publikovaných bylo přidáno do ETD: WASP-52b, WASP-58b, WASP-59b, WASP-60b a KELT-3b

2012-07-12 : New transiting exoplanet GJ3470 b Cnc was added to ETD.

2012-07-12 : New transiting exoplanet - HATS-1 b was added to ETD.

2012-02-05 : Three new exoplanets were added to ETD: HAT-P-8 b (Tri), Kepler-23 b (previous designation KOI 168.03) and Kepler-23 c (KOI 168.01) Cyg.

2012-01-19 : 6 recently published transiting exoplanets were added to ETD: Kepler-21 b, HAT-P-34 b, HAT-P-35 b, HAT-P-36 b, HAT-P-37 b and CoRoT-19 b.

2011-10-28 : Qatar-2 b (Vir) transiting exoplanet was published by Marta L. Bryan et al., 2011. This object exhibits the deepest transits (3.5%) among all known transiting exoplanets. Second - outer planet "c" is producing editional RV variations.

Qatar-2: A K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit

2011-10-28 : New transiting exoplanet WASP-36 b (Hya) were recently announced by A. M. S. Smith et al. (2011):

WASP-36b: A new transiting planet around a metal-poor G-dwarf, and an analysis of correlated noise in transit light curves

2011-10-28 : Two new confirmed exoplanets - KOI 0135b (Lyr) and KOI 0204 (Cyg) by

A. S. Bonomo et al., 2011: SOPHIE velocimetry of Kepler transit candidates. V. The three hot Jupiters KOI-135b, KOI-204b and KOI-203b (alias Kepler-17b)

2011-09-28 : According to visual inspection of all available O-C diagrams in ETD, these objects exhibits some signs of Transit Timing Variations (TTV) and require more of your attention:

GJ1214 b
GJ436 b
HAT-P-10/WASP-11 b
OGLE-TR-10 b
OGLE-TR-113 b
OGLE-TR-132 b
Qatar-1 b
TrES-1 b
WASP-12 b
XO-1 b
XO-3 b

A lot of recently discovered transiting exoplanets contans only discovery observations and is also waiting for your observing time.

And also these Keplers' objects shows clear and confirmed TTV, especially Kepler-19 b. TTV of circumbinary planet Kepler-16(AB) b exhibits TTV according to changing position of transited stars, not becouse of variability of exoplanet orbital motion.
Kepler-11 b
Kepler-11 c
Kepler-11 d
Kepler-11 e
Kepler-11 f
Kepler-16(AB) b
Kepler-19 b
Kepler-9 b
Kepler-9 c

2011-09-25 : Focusing TTV diagrams
TTV plots in Exoplanet Transit Database were updated today. Simultaneously observed transits are now plotted in TTV figure as averaged values (red squares). The original points are colored grey. This leaded to significant focusing of TTV curve for many objects.

Size of the square depends on size (quality) of original points.

See ETD.

2011-09-24 : Archive of news and updates
We have released an archive of expired ETD news in order to improve the historical time-line of building the ETD.

2011-09-16 : New transiting exoplanet CoRoT-20 b (Mon) was added to ETD

For more information see M. Deleuil et al. (2011), XX. CoRoT-20b: A very high density, high eccentricity transiting giant planet

2011-09-16 : New transiting circumbinary exoplanet Kepler-16(AB) b was added to ETD

Kepler-16A b means transits of planet "b" on primary component of the binary with depth 0.019 mag and duration ~ 7 hours.
Kepler-16B b means transits of planet "b" on secondary binary component with depth only 0.001 mag and duration 1.5 hours.

The system also exhibits minimas of eclipsing binary with period 41 days.

ATTENTION! Transit predictions in ETD for this system are now wrong. We will improve predictions soon.

For more details about this great system, see a discovery paper by L. Doyle et al., (2011): Kepler-16: A Transiting Circumbinary Planet

2011-09-13 : New transiting super-Earth HD 97658b. A bright star (V = 7.7 mag) in Leo constellation was discovered to have a planet using RV technique. Recently Gregory W. Henry et al. (2011) have discovered a very shallow transits (depth 0.002 mag).

For more details see: Detection of a Transiting Low-Density Super-Earth

2011-09-11 : CoRoT-11 b orbital elements were refined according to recent transit observation. A period 2.99433d was refined to 2.994285d. Thanks to Ramon Naves for his accurate observation.

2011-09-09 : KOI-0084 was renamed to Kepler-19 b (Lyr). An extrasolar planet with perturbing "c" planet in the system shows +/- 5 minutes TTV as is described in discovery / confirmation paper by Sarah Ballard et al. (2011), The Kepler-19 System: A Transiting 2.2 R_Earth Planet and a Second Planet Detected via Transit Timing Variations

2011-09-09 : KOI-0020 was renamed to Kepler-12 b (Dra) according to discovery / confirmation paper by J. J. Fortney et al., (2011)

Discovery and Atmospheric Characterization of Giant Planet Kepler-12b: An Inflated Radius Outlier

2011-08-15 : New transiting exoplanet WASP-50 b (Eri) was added to ETD

M. Gillon et al. (2011) reported a discovery of another transiting exoplanet found by WASP survey:
WASP-50b: a hot Jupiter transiting a moderately active solar-type star

2011-08-10 : HD156846 b possible transit observing campaign
Between days 23rd and 25th August 2011, there is a change to catch transit of 359.6 day period extrasolar planet HD156846 b.
All southern observers are welcome to participate.

2011-08-03 : Kepler candidate KOI-0196 b has been confirmed by A. Santerne at al. (2011), SOPHIE velocimetry of Kepler transit candidates IV. KOI-196b: a non-inflated hot-Jupiter with a high albedo. Object was added to ETD.

One pre-confirmation observation by T. Scarmato fits well the final system parameters.

2011-07-30 : Kepler candidate KOI 203 b was renamed to Kepler-17 b (Cyg) according to discovery paper by J.M. Désert et al, 2011: The hot-Jupiter Kepler-17b: discovery, obliquity from stroboscopic starspots, and atmospheric characterization.

Interesting study including star-spot crossing analysis.
Two transits of this object (KOI 0203) were previously reported by Veli-Pekka Hentunen to TRESCA database, now renamed to Kepler-17 b as well. Both transit observations are in very good agreement with published parameters. Congratulation!

2011-07-14 : Kepler candidate KOI 128 b was renamed to Kepler-15 b (Cyg) according to discovery paper by Michael Endl et al, 2011: The First Kepler Mission Planet Confirmed With The Hobby-Eberly Telescope: Kepler-15b, a Hot Jupiter Enriched In Heavy Elements

2011-06-29 : New relatively bright Kepler exoplanet in close visual binary - Kepler-14 b

For more details, see the discovery paper.

2011-06-29 : New faint southern exoplanet (CoRoT-17 b Sct) was added to ETD
For details see discovery paper: Transiting exoplanets from the CoRoT space mission XVII. The hot Jupiter CoRoT-17b: a very old planet

2011-06-14 : Refined orbital periods for 9 transiting exoplanets

Based on observations stored in ETD, new - accurate orbital periods were found for 8 planets. One typo was corrected as well.

CoRoT-8 b : wrong period: 6.21229d, new period: 6.21272d
HAT-P-2 b : wrong period: 5.63341d, new period: 5.633495d
HAT-P-5 b : wrong period: 2.788491d, new period: 2.788474d
HAT-P-8 b: wrong period: 3.07632d, new period: 3.076339d
OGLE-TR-182 b: corrected typo in period, correct period: 3.9791 and transit epoch: 2454270.572
WASP-1 b: wrong period: 2.51996d, new period: 2.519945d
WASP-14 b: wrong period: 2.243752d, new period: 2.243765d
WASP-21 b: wrong period: 4.322482d, new period: 4.322541d
XO-4 b: wrong period: 4.12502d, new period: 4.12508d

2011-06-09 : Three new transiting exoplanets: HAT-P-31 b (Her), HAT-P-32 b (And) & HAT-P-33 b (Gem).
For details see discovery papers: > HAT-P-31b,c: A Transiting, Eccentric, Hot Jupiter and a Long-Period, Massive Third-Body, David M. Kipping et al., 2011
> HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars, J. D. Hartman et al., 2011

2011-05-28 : Transiting super-Earth Kepler-10 c was added to ETD

For details see discovery paper by F. Fressin et al., 2011, Kepler-10c, a 2.2-Earth radius transiting planet in a multiple system

2011-05-17 : Three new southern transiting exoplanets WASP-44b (Cet), WASP-45b (Scl) and WASP-46b (Ind)

Recent paper by D. R. Anderson et al. WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets describes discovery of this three hot-jupiters by SuperWASP South.

2011-05-04 : 55 e Cancri - a new transiting exoplanet!
According to recent paper by Winn et al., "A Super-Earth Transiting a Naked-Eye Star", we have added new object to ETD - a bright star hosting famous planetary system 55 Cancri. MOST photometry shows very shallow transits of "e" planet.

2011-04-28 : CoRoT candidates in ETD!
In cooperation with Space Research Institute, Austrian Academy of Sciences we have prepared a list of CoRoT candidates for follow-up / confirmation observation.

There is a list of 12 CoRoT candidate objects and CoRoT transit predictions for these objects. Observers with larger apertures are welcome to observe new CoRoT objects (all in Aql constellation).

We thank to dr. Jörg Weingrill for cooperation.

2011-04-18 : Three new transiting exoplanets were added to ETD
New exoplanets WASP-35 b, WASP-43 b and WASP-48 b were recently reported by B.Enoch et al. and C. Hellier et al. respectivelly.
Previously dicovered exoplanet HAT-P-30 b was renamed to HAT-P-30/WASP-51 b according to independent discovery by B. Enoch et al.

2011-03-22 : New transiting exoplanet HAT-P-30 b (Hya) was added to ETD.
For details about the planet see the discovery paper by J. A. Johnson et al. HAT-P-30b: A transiting hot Jupiter on a highly oblique orbit

2011-03-15 : New southern transiting exoplanet - WASP-23 b (Pup) was added to ETD
For details see a discovery paper by Amaury H.M.J. Triaud et al., WASP-23b: a transiting hot Jupiter around a K dwarf and its Rossiter-McLaughlin effect

2011-03-10 : Two new transiting exoplanets HAT-P-28 b (And) and HAT-P-29 b (Per) were added to ETD.
Both exoplanets were published recently in paper HAT-P-28b and HAT-P-29b: Two Sub-Jupiter Mass Transiting Planets by L. A. Buchhave et al.

2011-02-09 : New transiting exoplanet WASP-39 b (Vir) was added to ETD. For details on this new target, see F. Faedi et al., 2011, WASP-39b: a highly inflated Saturn-mass planet orbiting a late G-type star

2011-02-07 : 1200 KEPLER candidates were added to ETD
We have updated the section of KEPLER candidate exoplanets with new orbital elements and new candidates published recently by J. W. Borucki and the Kepler team (see the paper).
More accurate orbital elements gives observers better opportunity to catch the transit.
AN IMPORTANT NEW: We have added all KEPLER candidates to our fitting routine, so observers can process and submit observation to the TRESCA database.

2011-02-03 : Kepler-11 b, c, d, e, f and g planets were added to ETD. Both elements and all known transits recorded by Kepler spacecraft are now available in ETD.
All informations are from: J. J. Lissauer et al., 2011, A closely packed system of low-mass, low-density planets transiting Kepler-11 (preprint available here).

2011-01-27 : According to independent discovery of HAT-P-27 by SuperWASP (as WASP-40 b), we have renamed the planet to HAT-P-27/WASP-40 b.
It is the second planet discovered by both ground-based projects.

2011-01-26 : Toady, we have corrected an error in the transit fitting routine. Previously, the limb darkening coefficient wasn't assigned to the linear law.
Effectively, this means that the previous limb darkening law was not linear. This has now been corrected. We are thankful to Giuseppe Marino for pointing out this error to us.
We do not expect any changes in the determination of mid-transit times. However, some errors could have been introduced in the depth and duration determinations. We think that the effect on depth and duration was generally very small.

2011-01-20 : New transiting exoplanet HAT-P-27 b was added to ETD.
For more information see the discovery paper by Bence Béky, Gáspár Á. Bakos and others:
HAT-P-27b: A hot Jupiter transiting a G star on a 3 day orbit

2011-01-19 : New exoplanet KOI-428b was added to the ETD.

For more information see discovery paper: SOPHIE velocimetry of Kepler transit candidates II. KOI-428b: a hot Jupiter transiting a subgiant F-star by A. Santerne et al.

2011-01-11 : We've created a facebook page for ETD.
All transit observers are welcome to communicate there about our interesting exoplanet topic.

2011-01-11 : Kepler-10b and Kepler-9d planets were added to ETD Both planets are terestrical with wery small depth of transits ~ 0.0002 mags.
For more information see discovery papers:
- Kepler’s First Rocky Planet: Kepler-10b by N. M. Batalha, W. J. Borucki et al., 2011

2010-12-26 : New name among transiting exoplanets - and new transiting object: Qatar-1 b (Dra).
The planet has been added to ETD and to all its functions.
For more information about the target see the discovery paper:
K.A.Alsubai et al., 2010, Qatar-1b: a hot Jupiter orbiting a metal-rich K dwarf star

2010-12-18 : Two new southern transiting exoplanets were added to ETD.
WASP-34 b (Crt) and WASP-41 b (Cen).

2010-11-30 : The 100th transiting exoplanet in ETD! We have just added the 100th transiting exoplanet to ETD. The lucky one is WASP-31 b (Crt).
Is there enough observers to cover such increasing number of transiting exoplanets with observations?

2010-11-30 : New transiting exoplanet WASP-31 b (Crt) was added to ETD
D. R. Anderson et al. reports the discovery of the low-density, transiting giant planet WASP-31b. The planet is 0.47 Jupiter masses and 1.56 Jupiter radii. It is in a 3.4-day orbit around a 1-Gyr-old, late-F-type, V = 11.7 star, which is a member of a common proper motion pair. In terms of its low density, WASP-31b is second only to WASP-17b, which is a more highly irradiated planet of similar mass.

For more info see the paper:
WASP-31b: a low-density planet transiting a late-F-type star

2010-10-14 : New transiting exoplanet WASP-32 b (Psc) was added to ETD.
See a discovery paper by P. F. L Maxted et al. 2010: WASP-32b: A transiting hot Jupiter planet orbiting a lithium-poor, solar-type star

2010-10-07 : HAT-P-26 b and WASP-38 b were added to ETD.

2010-09-28 : WASP-10 c discovered using TTV!
G.Maciejewski at al. have recently published paper "Transit timing variation and activity in the WASP-10 planetary system" showing TTV with solution leading to aditional 0.1 Mj planet on 5.23 d period.
Data submitted to ETD and the ETD fitting alghorytm was used in the paper.
Congratulation to authors and thank to observers!

2010-08-29 : Non-linear ephemeris was implemented for transit predictions of two new transiters - Kepler-9 b and Kepler-9 c. The transit prediction should be now more accurate.

2010-08-28 : Kepler-9 b and Kepler-9 c transiting exoplanets were added to ETD
Please note, that there are VERY significant TTV (hours!), so linear ephemerides gives is a bit uncertain transit predictions. See the plots.

2010-08-24 : Five new transiting exoplanets HAT-P-20 b, HAT-P-21 b, HAT-P-22 b, HAT-P-23 b and HAT-P-24 b were added to ETD. All the stars are located in northern hemisphere.
For more details, see discovery papers:
HAT-P-24b: An inflated hot-Jupiter on a 3.36d period transiting a hot, metal-poor star, by D. M. Kipping et al.
HAT-P-20b--HAT-P-23b: Four Massive Transiting Extrasolar Planets by G. A. Bakos et al.

2010-08-19 : New transiting exoplanet WASP-37 b was added to ETD.
For more details, see discovery paper by E. K. Simpson et al., WASP-37b: a 1.7 MJ exoplanet transiting a metal-poor star

2010-07-29 : New transiting exoplanets HAT-P-18 b (Her) and HAT-P-19 b (And) were published in a paper by J. D. Hartman et al., 27th Jul 2010:
HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars
Both exoplanets were added to ETD.

2010-06-19 : We have prepared a special page for KEPLER candidate objects. Recently published list of 311 candidates by William J. Borucki (Characteristics of Kepler Planetary Candidates Based on the First Data Set: The Majority are Found to be Neptune-Size and Smaller) was combined with identification of KOI targets. For each KEPLER candidate, there is also available transit predictions (UNCERTAIN).

2010-06-16 : 5 new CoRoT planets (CoRoT-8, CoRoT-10, CoRoT-11, CoRoT-12 and CoRoT-13) has been added to the ETD.

2010-06-01 : New transiting exoplanet HAT-P-15 b (Per)
G. Kovács et al. has issued paper about discovery of new transiting exoplanet with 10.9 days orbital period.

For more information see discovery paper HAT-P-15b: A 10.9-day Extrasolar Planet Transiting a Solar-type Star

2010-05-16 : New transiting exoplanet HAT-P-16 b (And) was published by L. A. Buchhave et al.
For detail information about the system see discovery paper HAT-P-16b: A 4 Mj Planet Transiting A Bright Star On An Eccentric Orbit
The exoplanet was added to ETD predictions and to fitting procedure, so observers can upload measurmets to TRESCA database. Who will be the first?

2010-04-14 : 7 new transiting exoplanets by SuperWASP!
We have added the following new transiting exoplanets to ETD:
WASP-8 b, WASP-21 b, WASP-24 b, WASP-25 b, WASP-28 b, WASP-29 b and WASP-33 b
For more details, see

2010-04-12 : Two new transiting exoplanets were added to ETD: WASP-22 b (Eri) and WASP-26 b (Cet).
For details about the new targets see discovery papers: WASP-22 b: A transiting "hot Jupiter" planet in a hierarchical triple system by P. F. L. Maxted et al.
WASP-26b: A 1-Jupiter-mass planet around an early-G-type star by B. Smalley et al.

2010-04-07 : HAT-P-13: good news and bad news at

On-line transit predictions were updated with a new function. Observers can list transit predictions for user-defined time span for the observing place. Just type date FROM and TILL in fields at transit predictions page and submit. Maximum time span is set to 90 days for one listed table.

2010-03-25 : Refined prediction of HAT-P-13 possible transit.
Joshua N. Winn et al. has published paper The HAT-P-13 Exoplanetary System: Evidence for Spin-Orbit Alignment and a Third Companion with new precise radial velocity data. The refined orbit of HAT-P-13 c lead to predicted possible transit window centered at JD 2455315.2 +/- 1.9 (28th April, 2010, 17h UT).

2010-03-22 : News about upcoming HAT-P-13 two planet perturbation during April
Dr. Gregory Laughlin has written article Inside Information at
Bruce Gary has prepared page Two-Planet Perturbations for 2010 at AXA.

2010-03-18 : New transiting exoplanet CoRoT-9 b with 95days long period was discovered by H. J. Deeg, C. Moutou et al. in Nature.
The planet is orbiting in distance 0,36 AU around the parent star, has radius 1,05 Rjup and mass 0.84 Mjup. Transits are 0.017 mag depth and 8.08 hours long. Constelation: Serpens.
Congratulation to CoRoT and the discovery team!
For more information see the discovery paper: A transiting giant planet with a temperature between 250 K and 430 K.

2010-03-16 : Apsidal motion of WASP-12 b? All transits published in ETD were used in new paper by Christopher J. Campo et al., 2010.:
On the Orbit of Exoplanet WASP-12b .
Analysis of transit timings from ETD (TRESCA and AXA) and recent Spitzer secondary transits observation shows, that there is an apsidal motion present in the WASP-12b orbit.
It is another example, that publishing data in ETD is usefull, both for observers and for researchers.
We ask all observers of exoplanet transits to publish all their data in ETD (via TRESCA database). This will assure, that the observation will be used for scientific purposes.

2010-03-12 : New observing campaign: Search for HAT-P-13 c transit

2010-03-12 : New transiting exoplanet HAT-P-14 in Hercules
G. Torres, G. A. Bakos et al. has published another transiting exoplanet by HAT-Net. The targed is bright star in Hercules constelation 3086-00152 (V = 9.98), transits are 4,5 mmag depth and 131 minutes long. Orbital period 4.62 days.
For more information see the discovery paper:
HAT-P-14b: A 2 Jupiter-mass exoplanet transiting a bright F star
Object has been already added to ETD and TRESCA databases, so transit predictions are available now.

2010-02-22 : According to latest transit observation, CoRoT-1 b orbital period was refined to P = 1.508969 d (original Porb was 1.5089557 days).

2010-01-12 : New transiting exoplanet CoRoT-6 b in Oph
M. Fridlund et al. has published discovery of new Corot transiting exoplanet - CoRoT-6 b. This pretty faint object (13.9 mag) shows 0.015 mag depth transits, 245 minutes long.
The object was added to ETD and is now available in on-line predictions and for data submissions.
For more information see: Transiting exoplanets from the CoRoT space mission IX. CoRoT-6b: a transiting hot Jupiter planet in an 8.9d orbit around a low-metallicity star

2010-01-07 : Transit of HD80606 b 13th / 14th January 2010

We remind to observers an upcoming transit of longest-period known tranziting exoplanet HD 80606 b in UMa constelation.

The transit will begin at 21:59 UT, 13th January 2010, midtransit will occur at 3:48 UT, 14th January and ends at 9:37 UT, 14th January 2010.

2010-01-06 : Kepler-5 b transiting exoplanet was added to ETD. For more information about the system, see Borucki W. et al., 2010: Kepler Planet-Detection Mission: Introduction and First Results

2010-01-05 : New transiting exoplanets by Kepler!
NASA has published its early results with discoveries of 5 new tranziting exoplanets Kepler 4b, 5b, 6b, 7b and 8b.

Four objects (besides Kepler 5b with unknown midtransit epoch) was added to ETD.

2009-12-28 : AV CMi - eclipsing binary with transiting exoplanet? A. Liakos and P. Niarchos has found periodic transit-like features in light curve of ecplipsing binary AV CMi (EA, Porb = 2.277751 d). The third object is orbiting one of the binary component on inner orbit with period P' = 0.5192237 days. Published orbital elements for transits are
Tmid = HJD 2454521.36315 + 0.5192237d * E
Transit duration is 3.3 hours (200 minutes) and the depth is about 2.6% (0.028 mag).
Apparent magnitude of AV CMi is about 11.5 mag and EB amplitude is 0.3 mag.
We have prepared predictions of the probably transit for observers here.
Results of preliminary study published by Liakos and Niarchos leads to a conclusion, that the third object must be a brown dwarf or hot jupiter exoplanet.
For more information see: A. Liakos, P. Niarchos, Preliminary results for the triple system AV CMi

2009-12-19 : NEW SOUTHERN TRANSITING EXOPLANET WASP-19 B was added to ETD. It is the shortest period transiting exoplanet yet discovered.
The object is now available in our transit predictions and also is available for data submission to ETD.
For more information see discovery paper by L. Hebb et al., 2010, The Shortest Period Transiting Exoplanet Yet Discovered

2009-12-16 : GJ 1214 b - NEW TRANZITING SUPER-EARTH IN Oph!
David Charbonneau et al. has discovered a new tranziting super-Earth (Rp = 2,68 Re) - GJ 1214 b. The planet has mass Mp = 6,55Me and orbital period 1,58 days.
While CoRoT-7 b, the first known tranziting super Earth has very shallow transits (0.0004 mag), the newly discovered tranziter has much deeper transits: 0.017 mag! It is orbiting a red dwarf star, not a Sun-like one. So many observers world-wide can focus on this target!
Although the star GJ 1214 is very faint in V band (V = 14.5 mag), in red and infrared colors it is much brighter (I = 11.5 mag). So 20cm telescope with CCD camera and I or Clear filter should be sufficient to obtain good photometry.
The new tranziter, GJ1214 b has been already added to ETD and so it is now available in tranzit predictions and for data submissions.
Clear skies!
A super-Earth transiting a nearby low-mass star David Charbonneau a kol. 2009, Nature 462, 891-894 (17 December 2009)

2009-12-01 : We would like to thank to Bruce Gary, for his great work on famous Amateur Exoplanet Archive. The AXA was a great inspiration for us, while creating the Exoplanet Transit Database.
The AXA has discontinued receiving data from 1st Dec 2009 and Bruce has recommended ETD for exoplanet transit observers.
We would like to welcome all observers and their observation. For data submission to ETD, please click on Model-fit your data. There are step-by-step instructions how to proceed.
In case of any questions, please contact Mr. Lubos Brat.

2009-10-02 : Upgrade of data fitting / submission
We have added a possibility to submit data in format JD - FLUX. Select "flux" item in first step of upload proces.

2009-09-21 : New transiting exoplanet COROT-5 b was added to ETD.
For details see discovery paper Transiting exoplanets from the CoRoT space mission: VII. The "hot-Jupiter"-type planet CoRoT-5b by H. Rauer et al. 2009

2009-09-16 : ETD in New Astronomy
We have written a paper about Exoplanet Transit Database with description of all it functions and alghorytms. The paper was finaly accepted to the New Astronomy journal in September 2009.
See Exoplanet Transit Database. Reduction and processing of the photometric data of exoplanet transits by S. Poddany, L. Brat and O. Pejcha.

2009-09-04 : A little bug in fitting procedure fixed (fitting has failed for objects with impact parameter b = 0.00).

2009-08-27 : New south transiting exoplanet, WASP-18 b (Phe) was added to ETD
C. Hellier et al. has published in NATURE journal discovery of 18th WASP exoplanet. The WASP-18 b is 10Mjup planet orbiting very very close to its parent star with period 0.94 days! The theory predicts to this planet strong tidal interaction with the star and soon death. For more information see the discovery paper.

2009-08-12 : New transiting exoplanet in Scorpius, WASP-17 b added to ETD
Exoplanet b orbiting its parent V=11.6 mag F6 star with period 3.73 days causes transits with depth 0.019 mag and duration 263 minutes.
Interesting on this planet is its probably retrograde orbit.
For more information see discovery paper by D. R. Anderson et al., WASP-17b: an ultra-low density planet in a probable retrograde orbit.

2009-08-04 : New transiting exoplanet - WASP-16 b in southern hemisphere was added to ETD.
Jupiter size planet with orbital period 3.11 days causes 0.012 mag depth transits with duration 115 minutes. The magnitude of parent star is V ~ 11.3 mag.
For more details see discovery paper by T. A. Lister et al: WASP-16b: A new Jupiter-like planet transiting a southern solar analog

2009-08-02 : Transiting super-Earth CoRoT-7 b added to ETD The smallest known transiting exoplanet CoRoT-7 b with radius 1.68 REarth was finaly published by A. Léger et al.
We have added this 0,0003 mag depth transiter of 11,7 mag faint star to ETD, whatever it is observable only by large telescopes or space missions.
For more details, see discovery paper: Transiting exoplanets from the CoRoT space mission VIII. CoRoT-7b: the first Super-Earth with measured radius, A. Léger et al., 2009

2009-07-22 : New transiting exoplanet HAT-P-13 b (and c ?) in UMa G. A. Bakos et al. has discovered a new transiting exoplanet in double exoplanet system HAT-P-13 b and c. The "b" planet is transiting with orbital period 2.9 days and "c" planet is outer-planet with period 428.5 days and it is not known to display transits.
The "b" planet was added to ETD with initial - discovery TTV data by Bakos et al. and is now available in transit predictions and in our fitting alghorytm.
For more details, see discovery paper HAT-P-13b,c: a transiting hot Jupiter with a massive outer companion on an eccentric orbit by G. A. Bakos and 17 co-authors.

2009-07-13 : Modelling of exoplanet system from transit light curve
We have added NEW FUNCTION to TRESCA & ETD transit submitions. Derived depth and length of transit are used for computing exoplanet parameters planet radius and inclination angle. Uncertainities are computed as well. The result is given both in table and as visualization of the transit event viewed from Earth. Comparation with catalogue / published parameters is available as well.
The model is located undermost in the TRESCA transit detail page.

2009-06-30 : HD80606 b - refined orbital elements
M. Gillon has published paper with detailed analysis of spectroscopic and photometric data from Feb transit of HD80606 b. The resulted transit ephemeris is
HJDmid = 2454876.323 + 111.43637*E
and transit lenght is refined to value 12.6 +0.7-1.7 hours.
Spin-orbit misalignement for the transiting planet HD 80606b

2009-06-11 : NEW FUNCTION IN ETD We have added possibility to fit data for unknown - user defined exoplanet. Choose "user defined exoplanet" in first step of fitting procedure (bottom in selection box) and follow the instructions. In the second step, a form where exoplanet designation and coordinates can be inputed appears.
And in the next step, user must type a predicted length of transit, planet radius and impact factor (0 - 1).

2009-05-27 : Transit of HD80606 b 4th/5th June 2009 We advice observers, that famous 111d period transiter HD80606 b discovered in february will undergo another transit event expected between 04.06 19:00 UT and 05.06 12:30 UT with center of the transit 05.06 3:30 UT.
Note, that transit duration 17,2 hour used for this prediction is not sure, becouse ingress wasnt' yet observed. If we take into account sure observations - last egress - and period 111.436d, we can expect the next egress will end in 5th June, 12.30 UT. A range of duration is 17,2 - 9,5 hours, so ingress must start between 4th June, 19:10 UT and 5th June 03:16 UT.
This is the main goal for observers - catch the ingress to find out true lenght of the transit.
See chart and prediction in detail

2009-05-27 : New function in ETD. List of transits is now available as ASCII table with fields terminated by semicolon. See link "Show data as ASCII table separated by semicolon" bellow each table with transits.

For example see list of transits in ASCII format for TrES-2 b.

This helps researchers to harvest data from ETD.

2009-05-20 : New transiting exoplanet WASP-13 b (Lyn) was added to ETD.
I. Skillen et al. has published new transiting exoplanet - WASP-13 b orbiting Solar like star GSC 2496-1114, V = 10.5 mag in Lynx with period 4.35298 days and transit epoch BJD = 2454491.6161. The depth of transit is 0.009 mag and duration 232 minutes.
For more details see discovery paper: The 0.5MJ transiting exoplanet WASP-13b

2009-05-01 : New transiting exoplanet HAT-P-12 b (CVn) was added to ETD.
Objects magnitude is V=12.8, spectrum K4 dwarf, cross-identification is GSC 03033-00706.
Orbital period P = 3.2130598 +/- 0.0000021 d, transit epoch Tc = 2454419.19556 +/- 0.00020 (BJD) and duration 140.3 +- 0.9 minutes. Transit depth is 0.020 mag.

The object was added to transit predictions, model-fitting algorithm and to main table.

For more details see discovery paper: J.D.Hartman et al., HAT-P-12b: A Low-Density Sub-Saturn Mass Planet Transiting a Metal-Poor K Dwarf

2009-04-02 : HAT-P-3 b orbital period refined to value P = 2.899703(1) d.

2009-03-19 : User defined PER and HJDmid in ETD outputs
O-C diagrams for each exoplanet now can be plotted using user-defined orbital elements (PER, EPOCH).
Transit predictions were updated in the same way.

For example see XO-1 b system.
- O-C diagram for default period
- O-C diagram for user-defined period

- Transit predictions for default Period
- Transit predictions for user-defined Period

2009-03-18 : All CoRoT-Exo objects were renamed to CoRoT-n according to announcement by Jean Schneider, published by CoRot Scientific Council.

2009-02-26 : HD80606 b (UMa) shows primary transits!
C. Moutou et al. has detected egress in night 13./14. Feb 2009, what makes HD80606 b the transiting exoplanet with longest known orbital period 111.436 days.
HD80606 b was added to ETD with the longest possible transit duration 17.2 hours, to make prediction transit time span 100% for future ingress detections.

For more details see discovery paper by C. Moutou et al.
Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b

2009-02-17 : WASP-15 b (Cen), a new southern transiting exoplanet was added to ETD. For more details, see discovery paper by West et al.:
The low density transiting exoplanet WASP-15b

2009-02-11 : Data fitting procedure was updated. There is now showing both original light and trend-removed light curve with a fit.

2009-01-30 : WASP-6 b (Aqr), a new transiting exoplanet was added to ETD. For more details, see discovery paper by M. Gillon et al.: Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

2009-01-25 : Instructions how to cite data from ETD in scientific papers were updated.

2009-01-14 : New prediction feature was added to ETD. For each transiter, you can display transit prediction for next year (next 365 days).
For your observing place, you'll obtain all transits with highlighted observable versus below horizont and during daylight.

For example see transit prediction for HD17156 b for central Europe in next 365 days.

This ETD function is accessible via Transit predictions (click on object designation in main table) and via main object page (click on "Show transit predictions for NEXT 365 days" function).

2009-01-11 : The keying mistake in transit epoch Tmid and transit duration value for WASP-14 b were corrected. The right elements are: Tmid(HJD) = 2454463.57583 + 2.243752*P and duration is 183.6 min according to discovery paper.

2009-01-06 : New transiting exoplanet HAT-P-11b (Cyg) was added to ETD database.
For more information about the planet see discovery paper by G. A. Bakos et al.: HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field

2008-12-18 : New transiting exoplanet WASP-12b (Aur) was added to ETD database.
For more information about the planet see discovery paper by Hebb et al.: WASP-12b: The hottest transiting planet yet discovered

2008-12-15 : A link to ETD was added to

2008-12-08 : New transiting exoplanet HAT-P-8 b (Peg) was added to database. For more information see discovery paper by David W. Lathman et al. "HATNet Field G205: Follow-Up Observations of 28 Transiting-Planet candidates and Confirmation of the Planet HAT-P-8b".

2008-12-04 : New southern transiting exoplanet OGLE-TR-L9 b (Car) discovered by Snellen et al. was added to ETD database.

Discovery paper: OGLE2-TR-L9: An extrasolar planet transiting a fast-rotating F3 star

2008-10-27 : Current statistics window was added to right column on ETD homepage.

2008-10-08 : CoRoT-Exo-3 b (Aql) was added to list of known transiters.

2008-10-02 : Columns EPOCH, O-C were added to transits tables. If available, observing data can be downloaded - just click to DQ index.

2008-10-01 : 17 transits from TRESCA project was recorded to ETD.

2008-10-01 : Transiting exoplanet HAT-P-10b alias WASP-11b is stored with designation HAT-P-10b in ETD.

2008-10-01 : Exoplanet Transit Database has been released for public.

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Current statistics:
(19. 2. 2017)
# of objects: 308
# of transits: 6722

DQ# of transits