# Q81810021

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81810021](https://www.wikidata.org/wiki/Q81810021)  
**Source**: https://4ort.xyz/entity/q81810021


## References

1. SIMBAD
2. A spectroscopic survey and analysis of bright, hydrogen-rich white dwarfs
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. The SDSS Photometric Catalog, Release 7
5. The formation rate and mass and luminosity functions of DA white dwarfs from the Palomar Green survey
6. Gaia Data Release 2
7. The binary fraction of low-mass white dwarfs