# Q81821647

> Seyfert 1 galaxy in the constellation Hercules

**Wikidata**: [Q81821647](https://www.wikidata.org/wiki/Q81821647)  
**Source**: https://4ort.xyz/entity/q81821647


## References

1. SIMBAD
2. The SDSS Photometric Catalog, Release 9
3. The eleventh and twelfth data releases of the Sloan Digital Sky Survey: final data from SDSS-III
4. A catalogue of quasars and active nuclei: 13th edition
5. Gaia Data Release 2
6. DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission