Tags: Star.
R Hydrae also known as R Hya is a Mira-type variable star in the constellation Hydra.The magnitude of R Hydrae varies over a period of 389 days between 3.21 and 11.00. The period of R Hydrae changes slowly. At maximum brightness the star can be seen with the naked eye while at minimum a telescope of at least 5 cm is needed.R Hydrae is approximately 2000 light years from Earth. R Hydrae’s spectral class is M7IIIe.
