NGC 591
| NGC 591 | |
|---|---|
 | |
| Observation data | |
| Constellation | Andromeda |
| Right ascension | 01h 33m 31.2s |
| Declination | 35° 40′ 06″ |
| Distance | 206,000,000 |
| Apparent magnitude (V) | 12.9 |
| Absolute magnitude (V) | -2.01 |
| Characteristics | |
| Type | Lenticular |
| Other designations | |
| Mrk 1157 | |
NGC 591 is a lenticular galaxy in the constellation Andromeda, located 206 million light years from Earth. It was discovered by Truman Safford on 10 October 1866.[1]
Characteristics
[edit]NGC 591 has an apparent magnitude of 13[2] and an absolute magnitude of -2.01. It is moving at 4549 km/s relative to Earth.[3] It has an angular size of 1.3 x 1.0 milliarcseconds.[4]
Supermassive black hole
[edit]A 2007 study of supermassive black hole masses estimated the mass of the black hole at the center of NGC 591 to be 6.8 million solar masses.[5]
Another study in 2012, which used the velocity dispersion in the center of the galaxy to find the black hole's mass, produced an estimate of 11 million solar masses.[6]
NGC 507 group
[edit]NGC 591 is part of the NGC 507 galaxy group. This group includes 42 galaxies, 21 of which are listed in the New General Catalogue and 5 of which are listed in the Index Catalogue. Four are Markarian galaxies.[7]
References
[edit]- ↑ "SkyView images". skyview.gsfc.nasa.gov. Retrieved 2026-08-08.
- ↑ "New General Catalog Objects: NGC 550 - 599". cseligman.com. Retrieved 2026-09-02.
- ↑ "NGC 591 - Galaxy - WIKISKY". server1.wikisky.org. Retrieved 2026-08-08.
- ↑ "New General Catalog Objects: NGC 550 - 599". cseligman.com. Retrieved 2026-08-08.
- ↑ Bian, W.; Gu, Q. (March 2007). "The Eddington Ratios in Seyfert 2 Galaxies with and without Hidden Broad-Line Regions". The Astrophysical Journal. 657 (1): 159-166. arXiv:astro-ph/0611199. Bibcode:2007ApJ...657..159B. doi:10.1086/510708.
{{cite journal}}: CS1 maint: date and year (link) - ↑ Marinucci, Andrea; Bianchi, Stefano; Andy D., Fabrizio; Matt, Giorgio (April 2012). "The Link between the Hidden Broad Line Region and the Accretion Rate in Seyfert 2 Galaxies". The Astrophysical Journal. 748 (2): 10 pages. arXiv:1201.5397. Bibcode:2012ApJ...748..130M. doi:10.1088/0004-637X/748/2/130.
{{cite journal}}: CS1 maint: date and year (link) - ↑ Garcia, A.M. (July 1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100 #1: 47-90. Bibcode:1993A&AS..100...47G.
{{cite journal}}: CS1 maint: date and year (link)