Astronomy:NGC 3940
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| 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] |
| Helio 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
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 3940". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3940.
- ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC%203940&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA%20or%20Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ "New General Catalog Objects: NGC 3900 - 3949". https://cseligman.com/text/atlas/ngc39.htm#3940.
- ↑ Gregory, S. A.; Thompson, L. A. (1978-06-15). "The Coma/A1367 supercluster and its environs" (in en). The Astrophysical Journal 222: 784. doi:10.1086/156198. ISSN 0004-637X. Bibcode: 1978ApJ...222..784G. http://adsabs.harvard.edu/doi/10.1086/156198.
- ↑ Tully, R. Brent (2015-04-28). "Galaxy Groups: A 2MASS Catalog". The Astronomical Journal 149 (5): 171. doi:10.1088/0004-6256/149/5/171. ISSN 1538-3881. Bibcode: 2015AJ....149..171T. https://iopscience.iop.org/article/10.1088/0004-6256/149/5/171.
- ↑ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami et al. (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. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X. Bibcode: 2021ApJ...914..121A.
External links
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