24. 4. 2017:
Alert on observing campaign focused on star KIC 2835289 (V = 13 mag). In term from 2nd to 3rd June 2017 the tertial eclipses of the unique triple system should occur. These eclipses are known only thanks to the Kepler satellite and they occur very rarely, one times per 750 days! Help us to confirm them by ground-based observations. For sure, measurements should be done also one day before and after the term. More about the campaign find HERE.

3. 4. 2017:
The 40th publication of minima timings of eclipsing binaries from B.R.N.O. project has been already published! Our thanks belong to all observers (unbelievable 83 observers were involved here)! Publication contains record number of minima timings (3394) for 1096 objects.

We thank all the enthusiastic variable star observers for their contribution to B.R.N.O database. Now let’s wait and watch how the data are used by professional astrophysicists :-)

The research was published in on-line OEJV journal and you can find it HERE.

B.R.N.O. Project - Eclipsing Binaries

Welcome to B.R.N.O. web page about eclipsing binaries!

Acronym B.R.N.O. means Brno Regional Network of Observers and points to historical connection between eclipsing binary observers and Brno Observatory.

Observing eclipsing binaries has long tradition in Czech republic, started in 1960. Main observation result is time of minimum.

It is possible to observe both visually and with CCD camera. Times of minima and research papers were published mostly in "Contributions of Observatory and Planetarium of Nicholas Copernicus in Brno" and in our bulletin Perseus. Recently, data are published only in electronical journals - like IBVS (Information Bulletin on Variable Stars) or OEJV (Open European Journal on Variable Stars).

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