| NGC 3177 | |
|---|---|
 NGC 3177, as imaged by theHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Leo |
| Right ascension | 10h 16m 33s |
| Declination | +21° 07′ 23″ |
| Apparent magnitude (V) | 11.6[1] |
| Apparent magnitude (B) | 12.8 |
| Surface brightness | 22.34 mag/arcsec^2 |
| Characteristics | |
| Type | SA(rs)b[1] |
| Apparent size (V) | 1.6′ × 1.3′[1] |
| Other designations | |
| UGC 05544, MRK 9018, CGCG 123-032, MCG +04-24-023, IRAS 10138+2122, PGC 030010 | |
NGC 3177 is aspiral galaxy located in theconstellation Leo. Its speed relative to thecosmic microwave background is 1,627 ± 22 km/s, which corresponds to aHubble distance of 24.0 ± 1.7 Mpc (~78.3 millionly).[2] NGC 3177 was discovered by the German-BritishastronomerWilliam Herschel in 1784.[3]
Theluminosity class of NGC 3177 is II and it has a broad HI line. It also contains regions ofionized hydrogen.[2] According to theSIMBAD database, NGC 3177 has anactive galactic nucleus.[4]
To date, nine non-redshift measurements yield a distance of 27.722 ± 4.581 Mpc (~90.4 million ly), which is within the distance values of Hubble.[1]
ThesupernovaSN 1947A was discovered in NGC 3177 on March 5, 1947, byEdwin Hubble. The type of this supernova has not been determined.[5]
NGC 3177 is part of theNGC 3227 group. In addition to NGC 3177 and NGC 3227, this group includes at least 16 other galaxies includingNGC 3162,NGC 3185,NGC 3187,NGC 3190,NGC 3193,NGC 3213,NGC 3226,NGC 3227,NGC 3287 andNGC 3301.[6]
