# Q66630507
**Wikidata**: [Q66630507](https://www.wikidata.org/wiki/Q66630507)  
**Source**: https://4ort.xyz/entity/q66630507


## References

1. SIMBAD
2. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
3. The Tycho-2 catalogue of the 2.5 million brightest stars
4. Third U.S. Naval Observatory CCD Astrograph Catalog (UCAC3)
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters
8. SP_Ace: a new code to derive stellar parameters and elemental abundances
9. Extremely metal-deficient red giants. II. Chemical abundances in 21 halo giants