About VarAstro

Welcome to VarAstro, unique portal for publication and sharing of photometric data running by Czech Astronomical Society, Variable Star and Exoplanet Section. The portal is a successor of famous web var.astro.cz ran for last two decades, Exoplanet Transit Database (ETD) and O-C gateway.

User Info

Most of functionality of VarAstro is available for logged users. If you don't have logging credentials, you can create your own new account free of charge. If you had an account at portal var2.astro.cz, use the same e-mail address as a login and you can migrate all your data easily to the new portal. | Login, Register

Object search

Star catalog

Enter full or partial star name
Or enter equatorial coordinates (J2000.0)

Exoplanet catalog

Enter full or partial exoplanet name
Or enter equatorial coordinates (J2000.0)
1/20/2025 2:48:51 PM

VarAstro Data Statistics

Objects last month

16

Objects total in database

59959

Observations last month

325

Observations total in database

80689

Minima in last month

116

Minima total in database

302944

Transits in last month

193

Transits total in database

15983

Active observers last month

48

Observers total in database

1238

Most active last month

Yves Jongen

Most observed last month

WASP-12