| NGC 3947 | |
|---|---|
 The barred spiral galaxy NGC 3947 | |
| Observation data (J2000epoch) | |
| Constellation | Leo |
| Right ascension | 11h 53m 20.3285s[1] |
| Declination | +20° 45′ 06.049″[1] |
| Redshift | 0.020698[1] |
| Heliocentric radial velocity | 6205 ± 2 km/s[1] |
| Distance | 314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc)[1] |
| Group orcluster | NGC 3947 Group,Leo Cluster |
| Apparent magnitude (V) | 13.2[1] |
| Characteristics | |
| Type | (R)SB(rs)b[1] |
| Size | ~153,100 ly (46.93 kpc) (estimated)[1] |
| Apparent size (V) | 1.4′ × 1.2′[1] |
| Other designations | |
| IRAS 11507+2101,2MASX J11532031+2045055,UGC 6863,MCG +04-28-088,PGC 37264,CGCG 127-095[1] | |
NGC 3947 is abarred spiral galaxy in theconstellation ofLeo. Its velocity with respect to thecosmic microwave background is 6528 ± 23 km/s, which corresponds to aHubble distance of 314.0 ± 22.0 Mly (96.28 ± 6.75 Mpc).[1] In addition, threenon redshift measurements give a distance of 284.67 ± 12.90 Mly (87.28 ± 3.956 Mpc).[2] It was discovered by German-British astronomerWilliam Herschel on 26 April 1785.[3]
Foursupernovae have been observed in NGC 3947:
NGC 3947 is part of the 16 member NGC 3842 group, named after the brightest galaxy in the group. The other galaxy members are:NGC 3805,NGC 3837,NGC 3842,NGC 3860,NGC 3862,NGC 3883,NGC 3884,NGC 3919,NGC 3929,NGC 3937,NGC 3940,NGC 3954,UGC 6583,UGC 6697, andUGC 6725.[12]
Like many of the neighboring galaxies, NGC 3947 and the galaxies in the NGC 3842 group are part of theLeo galaxy cluster (also known as Abell 1367).
Media related toNGC 3947 at Wikimedia Commons
