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)
9/16/2025 9:26:46 PM

VarAstro Data Statistics

Objects last month

31

Objects in database

62244

Observations last month

291

Observations in database

82879

Minima last month

298

Minima in database

304545

Transits last month

105

Transits in database

16874

Active observers last month

46

Observers in database

1628

Most active last month

Vojtěch Školník

Most observed last month

V0959 Cep