# Q81831929

> quasar in the constellation Hercules

**Wikidata**: [Q81831929](https://www.wikidata.org/wiki/Q81831929)  
**Source**: https://4ort.xyz/entity/q81831929


## References

1. SIMBAD
2. The Sloan Digital Sky Survey quasar catalog: tenth data release
3. The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release
4. The SDSS Photometric Catalog, Release 9
5. The Sloan Digital Sky Survey quasar catalog. V. Seventh data release
6. A catalogue of quasars and active nuclei: 13th edition
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