Constellation Hydra | ||
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Similar R Leonis, Mira, Chi Cygni, V Hydrae, R Aquarii | ||
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 3.5 and 10.9. 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 400 light years from Earth. Its spectral class is M7IIIe.
References
R Hydrae Wikipedia(Text) CC BY-SA