# Q66635639
**Wikidata**: [Q66635639](https://www.wikidata.org/wiki/Q66635639)  
**Source**: https://4ort.xyz/entity/q66635639


## References

1. SIMBAD
2. Catalogue of two dimentional spectral types for the HD stars, Vol. 2
3. Photometric standard sequences in Norma
4. Second USNO CCD Astrograph Catalog
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. The projected rotational velocity distribution of a sample of OB stars from a calibration based on synthetic He I lines