# Q81819122

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81819122](https://www.wikidata.org/wiki/Q81819122)  
**Source**: https://4ort.xyz/entity/q81819122


## References

1. SIMBAD
2. Post-common envelope binaries from SDSS - VII. A catalogue of white dwarf-main sequence binaries
3. SDSS DR7 white dwarf catalog
4. White dwarf-main sequence binaries identified within SDSS DR7 and UKIDSS DR5
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The SDSS Photometric Catalog, Release 7
7. Gaia Data Release 2
8. Spectral analysis of 636 white dwarf-M star binaries from the Sloan Digital Sky Survey
9. The WIRED survey. II. Infrared excesses in the SDSS DR7 white dwarf catalog
10. A spectroscopic survey and analysis of bright, hydrogen-rich white dwarfs