# Q89856638

> Seyfert 2 galaxy in the constellation Hercules

**Wikidata**: [Q89856638](https://www.wikidata.org/wiki/Q89856638)  
**Source**: https://4ort.xyz/entity/q89856638


## References

1. SIMBAD
2. Demographics of Sloan Digital Sky Survey galaxies along the Hubble sequence
3. The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey
4. A catalogue of quasars and active nuclei: 13th edition
5. The SDSS Photometric Catalog, Release 8
6. The SDSS Photometric Catalog, Release 7
7. The Two Micron All Sky Survey (2MASS)
8. Gaia Data Release 2
9. Galaxy groups: a 2MASS catalog