# Q81507612

> quasar in the constellation Canes Venatici

**Wikidata**: [Q81507612](https://www.wikidata.org/wiki/Q81507612)  
**Source**: https://4ort.xyz/entity/q81507612


## References

1. SIMBAD
2. The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release
3. Correcting C IV-based virial black hole masses
4. A catalogue of quasars and active nuclei: 13th edition
5. The SDSS Photometric Catalog, Release 9
6. The Sloan Digital Sky Survey quasar catalog. V. Seventh data release
7. The SDSS Photometric Catalog, Release 7
8. Gaia Data Release 2
9. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission