# Q84221421

> white dwarf in the constellation Hydra

**Wikidata**: [Q84221421](https://www.wikidata.org/wiki/Q84221421)  
**Source**: https://4ort.xyz/entity/q84221421


## References

1. SIMBAD
2. A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4
3. SDSS DR7 white dwarf catalog
4. A catalog of spectroscopically identified white dwarf stars in the first data release of the Sloan Digital Sky Survey
5. A photometric selection of white dwarf candidates in Sloan Digital Sky Survey Data Release 10
6. The Sixth Data Release of the Sloan Digital Sky Survey
7. The USNO-B Catalog
8. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission
9. The SDSS Photometric Catalog, Release 9
10. Gaia Data Release 2