# Q81914521

> white dwarf in the constellation Ursa Major

**Wikidata**: [Q81914521](https://www.wikidata.org/wiki/Q81914521)  
**Source**: https://4ort.xyz/entity/q81914521


## References

1. SIMBAD
2. Spectroscopy of stellar-like objects contained in the second Byurakan survey. I
3. Spectral classification of stars in the Second Byurakan Sky Survey. I
4. Fourth USNO CCD Astrograph Catalog
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The USNO-B Catalog
7. The SDSS Photometric Catalog, Release 8
8. Gaia Data Release 2
9. Quantifying kinematic substructure in the Milky Way's stellar halo
10. The Milky Way's circular velocity curve to 60 kpc and an estimate of the dark matter halo mass from the kinematics of ~2400 SDSS blue horizontal-branch stars