---
name: R Hydrae
constellation: Hya
created_by: 8mag
created_date: 2022-01-21 17:00:00
updated_by: skybber
updated_date: 2022-02-06 11:44:10.602134
---
a red giant, one of the most famous Mira Ceti type variable stars. It varies in apparent brightness from 3.5mag to 10.9mag over a period of 389.6 days, first noticed by astronomers in the 17th century. However, the period has probably shortened by about 100 days since then. It is about 700 light-years away and at its greatest peak exceeds the luminosity of 7,000 Suns.