# Q81910331

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81910331](https://www.wikidata.org/wiki/Q81910331)  
**Source**: https://4ort.xyz/entity/q81910331


## References

1. SIMBAD
2. Common proper-motion wide white dwarf binaries selected from the Sloan Digital Sky Survey
3. SDSS DR7 white dwarf catalog
4. The SDSS Photometric Catalog, Release 8
5. Gaia Data Release 2
6. Constraints on the initial-final mass relation from wide double white dwarfs