| NGC 684 | |
|---|---|
 NGC 684 (SDSS) | |
| Observation data (J2000.0epoch) | |
| Constellation | Triangulum |
| Right ascension | 01h 50m 14.0407s[1] |
| Declination | +27° 38′ 44.472″[1] |
| Redshift | 0.011798[1] |
| Heliocentric radial velocity | 3537 ± 1km/s[1] |
| Distance | 135.03 ± 3.13 Mly (41.400 ± 0.960 Mpc)[1] |
| Group orcluster | NGC 684 group (LGG 32) |
| Apparent magnitude (V) | 12.50[2] |
| Apparent magnitude (B) | 13.30[2] |
| Characteristics | |
| Type | Sb edge-on[1] |
| Size | ~137,500 ly (42.15 kpc) (estimated)[1] |
| Apparent size (V) | 3.2′ × 0.6′[1] |
| Other designations | |
| IRAS 01474+2724,IC 165,UGC 1292,MCG +04-05-017,PGC 6759,CGCG 482-022[1] | |
NGC 684 is aspiral galaxy approximately135 millionlight-years away from Earth in theconstellation ofTriangulum.[1] It was discovered byWilliam Herschel on October 26, 1786.[3]Edward Swift, Lewis' son, found this galaxy again on 18 Jan 1890 while "searching for Swift's Comet." and it was reported as a new object in list IX-6.[3]
NGC 684 is the largest member of a group of galaxies named after it (also known asLGG 32), which includes the galaxiesNGC 670 andIC 1731.[4]
Twosupernovae have been observed in NGC 684:
Media related toNGC 684 at Wikimedia Commons | Thisspiral galaxy article is astub. You can help Wikipedia byexpanding it. |
