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

• NGC 3937

References

1. "Results for object NGC 3940". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 21 June 2025.
2. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2025-06-22.
3. "New General Catalog Objects: NGC 3900 - 3949". cseligman.com. Retrieved 2025-06-22.
4. 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.
5. 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.
6. 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

Media related to NGC 3940 at Wikimedia Commons