NGC 3940
| NGC 3940 | |
|---|---|
 SDSS image of NGC 3940 | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 52m 46.4s[1] |
| Declination | +20° 59′ 21″[1] |
| Redshift | 0.021415[1] |
| Heliocentric radial velocity | 6420 km/s[1] |
| Distance | 300 Mly (91.9 Mpc)[1] |
| Group or cluster | NGC 3937 Group |
| Apparent magnitude (V) | 13.8[1] |
| Absolute magnitude (B) | -22.87[1] |
| Characteristics | |
| Type | E[1] |
| Size | ~172,800 ly (52.97 kpc) (estimated)[1] |
| Apparent size (V) | 1.7′ × 1.6′[1] |
| Other designations | |
| UGC 06852, MCG +04-28-082,PGC 037224[1] | |
NGC 3940 is an elliptical galaxy, located 300 million light-years away[2] in the Leo constellation. It was discovered on April 26, 1785, by astronomer William Herschel.[3] NGC 3940 is a member of the NGC 3937 Group.[4][5]
NGC 3940 has a supermassive black hole with an estimated mass of 5 × 108 M☉.[6]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k "Results for object NGC 3940". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 21 June 2025.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2025-06-22.
- ^ "New General Catalog Objects: NGC 3900 - 3949". cseligman.com. Retrieved 2025-06-22.
- ^ Gregory, S. A.; Thompson, L. A. (1978-06-15). "The Coma/A1367 supercluster and its environs". The Astrophysical Journal. 222: 784. Bibcode:1978ApJ...222..784G. doi:10.1086/156198. ISSN 0004-637X.
- ^ Tully, R. Brent (2015-04-28). "Galaxy Groups: A 2MASS Catalog". The Astronomical Journal. 149 (5): 171. arXiv:1503.03134. Bibcode:2015AJ....149..171T. doi:10.1088/0004-6256/149/5/171. ISSN 1538-3881.
- ^ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.
External links
[edit]
Media related to NGC 3940 at Wikimedia Commons