NGC 7154
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| NGC 7154 | |
|---|---|
 NGC 7154 imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Piscis Austrinus |
| Right ascension | 21h 55m 21.1700s[1] |
| Declination | −34° 48′ 51.697″[1] |
| Redshift | 0.008726±0.000010[1] |
| Heliocentric radial velocity | 2,616±3 km/s[1] |
| Distance | 89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc)[2] |
| Group or cluster | IC 5156 group (LGG 450) |
| Apparent magnitude (V) | 13.14[1] |
| Characteristics | |
| Type | SB(s)m pec[1] |
| Size | ~86,400 ly (26.48 kpc) (estimated)[1] |
| Apparent size (V) | 2.1′ × 1.6′[1] |
| Other designations | |
| ESO 404- G 008, IRAS 21523-3503, 2MASX J21552103-3448507, MCG -06-48-005, PGC 67641[1] | |
NGC 7154 is a peculiar barred spiral galaxy in the constellation of Piscis Austrinus. Its velocity with respect to the cosmic microwave background is 2,356±18 km/s, which corresponds to a Hubble distance of 105.3 ± 7.5 Mly (32.3 ± 2.3 Mpc).[1] However, eight non-redshift measurements give a closer mean distance of 89.29 ± 16.04 Mly (27.375 ± 4.918 Mpc).[2] It was discovered by British astronomer John Herschel on 23 September 1834.[3]
NGC 7154 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.[4][5]
