# Q81920869

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81920869](https://www.wikidata.org/wiki/Q81920869)  
**Source**: https://4ort.xyz/entity/q81920869


## References

1. SIMBAD
2. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission
3. SDSS DR7 white dwarf catalog
4. A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
5. A photometric selection of white dwarf candidates in Sloan Digital Sky Survey Data Release 10
6. The Sixth Data Release of the Sloan Digital Sky Survey
7. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
8. The SDSS Photometric Catalog, Release 9
9. Gaia Data Release 2
10. Evidence for an external origin of heavy elements in hot DA white dwarfs
11. An improved spectroscopic analysis of DA white dwarfs from the Sloan Digital Sky Survey data release 4