# RU Hydrae

> Mira variable star in the constellation Hydra

**Wikidata**: [Q66613469](https://www.wikidata.org/wiki/Q66613469)  
**Source**: https://4ort.xyz/entity/ru-hydrae


## References

1. SIMBAD
2. Catalogue of spectra of Mira variables of types Me and Se
3. Gaia Data Release 3
4. Determination of pulsation periods and other parameters of 2875 stars classified as Mira in the All Sky Automated Survey (ASAS)
5. Long-period High-amplitude Red Variables in the KELT Survey
6. The Tycho-2 catalogue of the 2.5 million brightest stars
7. Catalogue of Stellar Photometry in Johnson's 11-color system
8. Gaia Data Release 2
9. Gaia Early Data Release 3
10. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
11. Validation of the new Hipparcos reduction