| NGC 391 | |
|---|---|
 SDSS image of NGC 391 | |
| Observation data (J2000epoch) | |
| Constellation | Cetus |
| Right ascension | 01h 07m 22.5865s[1] |
| Declination | +00° 55′ 33.403″[1] |
| Redshift | 0.017829±0.00000667[1] |
| Heliocentric radial velocity | 5,345±2 km/s[1] |
| Distance | 241.6 ± 17.0 Mly (74.07 ± 5.20 Mpc)[1] |
| Apparent magnitude (V) | 14.1g[1] |
| Characteristics | |
| Type | (R')SA0−:[1] |
| Size | ~94,800 ly (29.08 kpc) (estimated)[1] |
| Apparent size (V) | 0.89′ × 0.75′[1] |
| Other designations | |
| 2MASX J01072255+0055331,UGC 693,MCG +00-03-075,PGC 3976,CGCG 384-077[1] | |
NGC 391 is an unbarredlenticular galaxy located in the constellationCetus. Its velocity with respect to thecosmic microwave background is5,022±23 km/s, which corresponds to aHubble distance of 241.6 ± 17.0 Mly (74.07 ± 5.20 Mpc).[1] Additionally, onenon-redshift measurement gives a farther distance of 272 Mly (83.3 Mpc).[2] It was discovered by American astronomerGeorge Bond on January 8, 1853. It was described byDreyer as "faint, small, mottled but not resolved (Auwers 9)."[3]
Onesupernova has been observed in NGC 391:SN 2025rat (Type Ia, mag. 19.9454) was discovered byZwicky Transient Facility on 11 July 2025.[4]
Media related toNGC 391 at Wikimedia Commons.jpg) | Thislenticular galaxy article is astub. You can help Wikipedia byadding missing information. |
