# Q89831009

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q89831009](https://www.wikidata.org/wiki/Q89831009)  
**Source**: https://4ort.xyz/entity/q89831009


## References

1. SIMBAD
2. A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
3. X-ray-emitting stars identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey
4. SDSS DR7 white dwarf catalog
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. The Second Byurakan Survey. General Catalogue
8. The SDSS Photometric Catalog, Release 7
9. Gaia Data Release 2