# Q81809556

> hot subdwarf star in the constellation Ursa Major

**Wikidata**: [Q81809556](https://www.wikidata.org/wiki/Q81809556)  
**Source**: https://4ort.xyz/entity/q81809556


## References

1. SIMBAD
2. The Palomar-Green catalog of ultraviolet-excess stellar objects
3. Hot subluminous stars and blue objects in the Case low-dispersion northern sky survey. I
4. The Century Survey Galactic Halo Project. I. Stellar Spectral Analysis
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The SDSS Photometric Catalog, Release 9
7. Fourth USNO CCD Astrograph Catalog
8. Gaia Data Release 2
9. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission