# HD 21722

> star in the constellation Hydrus

**Wikidata**: [Q10849522](https://www.wikidata.org/wiki/Q10849522)  
**Source**: https://4ort.xyz/entity/q10849522


## References

1. SIMBAD
2. [VizieR](https://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ6274260a17f32b&-out.add=.&-source=VI/42/out&-c=051.2583%20-69.7715,eq=B1875,rs=2)
3. Source
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Cerro Armazones spectroscopic survey of F dwarfs
8. The FEROS-Lick/SDSS observational data base of spectral indices of FGK stars for stellar population studies
9. Spectroscopy of New High Proper Motion Stars in the Northern Sky. I. New Nearby Stars, New High-Velocity Stars, and an Enhanced Classification Scheme for M Dwarfs