# Q81911817

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81911817](https://www.wikidata.org/wiki/Q81911817)  
**Source**: https://4ort.xyz/entity/q81911817


## References

1. SIMBAD
2. SDSS DR7 white dwarf catalog
3. Washington Double Star 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