# Q81819070

> quasar in the constellation Leo

**Wikidata**: [Q81819070](https://www.wikidata.org/wiki/Q81819070)  
**Source**: https://4ort.xyz/entity/q81819070


## References

1. SIMBAD
2. A strong redshift dependence of the broad absorption line quasar fraction
3. A catalogue of quasars and active nuclei: 13th edition
4. The Third Data Release of the Sloan Digital Sky Survey
5. USNO-A2.0
6. The SDSS Photometric Catalog, Release 7
7. Gaia Data Release 2