# MQ Hydrae

> long period variable

**Wikidata**: [Q92576012](https://www.wikidata.org/wiki/Q92576012)  
**Source**: https://4ort.xyz/entity/mq-hydrae


## References

1. SIMBAD
2. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
3. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. The Tycho-2 catalogue of the 2.5 million brightest stars
6. Gaia Early Data Release 3
7. Gaia Data Release 2
8. Stellar atmospheric parameters for 754 spectra from the X-shooter Spectral Library