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

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