# Q84224604

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q84224604](https://www.wikidata.org/wiki/Q84224604)  
**Source**: https://4ort.xyz/entity/q84224604


## References

1. SIMBAD
2. A detailed model atmosphere analysis of cool white dwarfs in the Sloan Digital Sky Survey
3. The USNO-B Catalog
4. The SDSS Photometric Catalog, Release 7
5. The SDSS Photometric Catalog, Release 9
6. Gaia Data Release 2
7. Ultracool white dwarfs and the age of the Galactic disc