# NGC 3997

> galaxy

**Wikidata**: [Q1108440](https://www.wikidata.org/wiki/Q1108440)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/NGC_3997)  
**Source**: https://4ort.xyz/entity/ngc-3997


## References

1. SIMBAD
2. VizieR
3. The complete census of optically selected AGNs in the Coma supercluster: the dependence of AGN activity on the local environment
4. The Updated Zwicky Catalog (UZC)
5. The Two Micron All Sky Survey (2MASS)
6. The SDSS Photometric Catalog, Release 7
7. Uppsala General Catalogue of Galaxies. Data for 12,921 galaxies north of delta =-2 30
8. Galaxy groups: a 2MASS catalog
9. Groups of Galaxies in the Two Micron All Sky Redshift Survey