# NGC 4021

> galaxy

**Wikidata**: [Q1108543](https://www.wikidata.org/wiki/Q1108543)  
**Source**: https://4ort.xyz/entity/ngc-4021


## References

1. VizieR
2. Demographics of Sloan Digital Sky Survey galaxies along the Hubble sequence
3. SIMBAD
4. The SDSS Photometric Catalog, Release 7
5. Gaia Data Release 2
6. The Two Micron All Sky Survey (2MASS)
7. Galaxy groups: a 2MASS catalog