Welcome to VarAstro, a portal for publishing and sharing photometric data, run by the Variable Star and Exoplanet Section of the Czech Astronomical Society. It is a successor to the well-known var.astro.cz / var2.astro.cz website, which operated for two decades, as well as to the Exoplanet Transit Database (ETD) and the O-C gateway.

Most of VarAstro's functionality is available to logged-in users. If you don't have an account yet, you can create one free of charge. If you had an account on the var2.astro.cz portal, register with the same email address and the data from your previous account will be linked to the new one automatically. | Login, Register