NGC 3955
Galaxy in the constellation Crater
From Wikipedia, the free encyclopedia
NGC 3955 is a peculiar lenticular galaxy in the constellation of Crater. Its velocity with respect to the cosmic microwave background is 1,842±26 km/s, which corresponds to a Hubble distance of 88.6 ± 6.3 Mly (27.16 ± 1.94 Mpc).[1] Additionally, one non-redshift measurement gives a closer distance of 67.19 Mly (20.600 Mpc).[2] It was discovered by German-British astronomer William Herschel on 21 December 1786.[3][4]
| NGC 3955 | |
|---|---|
NGC 3955 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Crater |
| Right ascension | 11h 53m 57.1556s[1] |
| Declination | −23° 09′ 50.891″[1] |
| Redshift | 0.004973±0.0000300[1] |
| Heliocentric radial velocity | 1,491±9 km/s[1] |
| Distance | 67.19 Mly (20.600 Mpc)[2] |
| Group or cluster | NGC 4038 Group (LGG 263) |
| Apparent magnitude (V) | 12.89[1] |
| Characteristics | |
| Type | S0/a pec[1] |
| Size | ~105,400 ly (32.32 kpc) (estimated)[1] |
| Apparent size (V) | 2.9′ × 0.9′[1] |
| Other designations | |
| ESO 504- G 026, IRAS 11514-2253, 2MASX J11535713-2309513, MCG -04-28-005, PGC 37320[1] | |
NGC 3955 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[5][6]
