# NGC 7509

> active galactic nucleus

**Wikidata**: [Q1167828](https://www.wikidata.org/wiki/Q1167828)  
**Source**: https://4ort.xyz/entity/ngc-7509


## References

1. SIMBAD
2. The K‐Band Galaxy Luminosity Function
3. The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey
4. The SDSS Photometric Catalog, Release 9
5. A catalogue of quasars and active nuclei: 13th edition
6. Gaia Data Release 2
7. The Two Micron All Sky Survey (2MASS)
8. NIBLES: an H I census of stellar mass selected SDSS galaxies
9. Groups of Galaxies in the Two Micron All Sky Redshift Survey