# Gliese 221

> star

**Wikidata**: [Q5176443](https://www.wikidata.org/wiki/Q5176443)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Gliese_221)  
**Source**: https://4ort.xyz/entity/gliese-221


## References

1. SIMBAD
2. The HARPS search for southern extra-solar planets. XXXII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone
3. Extrasolar Planets Encyclopaedia
4. UBV(RI)CJHK observations of Hipparcos-selected nearby stars
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Fourth USNO CCD Astrograph Catalog
7. Gaia Early Data Release 3
8. Gaia Data Release 2
9. Gaia Data Release 2. The catalogue of radial velocity standard stars
10. Rotation-Activity Correlations in K and M dwarfs. I. Stellar parameters and compilations of v.sin(i) and P/sin(i) for a large sample of late-K and M dwarfs
11. Characterization of a sample of Southern M dwarfs using HARPS and X-shooter spectra
12. SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs