| NGC 925 | |
|---|---|
 NGC 925 imaged with the 32 inch telescope atMount Lemmon Observatory | |
| Observation data (J2000epoch) | |
| Constellation | Triangulum |
| Right ascension | 02h 27m 16.913s[1] |
| Declination | +33° 34′ 43.97″[1] |
| Redshift | 553 ± 3 km/s[2] |
| Heliocentric radial velocity | 564[3]km/s |
| Distance | 30.3 ± 2.3 millionlight years (9.29 ± 0.69Mpc)[4] |
| Group orcluster | NGC 1023 Group[5] |
| Apparent magnitude (V) | 10.7[2] |
| Characteristics | |
| Type | SB(s)d[3] |
| Apparent size (V) | 10′.5 × 5′.9[2] |
| Other designations | |
| IRAS 02243+3321,UGC 1913,MCG +05-06-045,PGC 9332,CGCG 504-085[2] | |
NGC 925 is abarred spiral galaxy located about 30[4] millionlight-years away in the constellationTriangulum.German-British astronomerWilliam Herschel discovered this galaxy on 13 September 1784.[6]
Themorphological classification of this galaxy is SB(s)d,[3] indicating that it has abar structure and loosely wound spiral arms with no ring.[7] The spiral arm to the south is stronger than the northern arm, with the latter appearingflocculent and less coherent. The bar is offset from the center of the galaxy and is the site of star formation all along its length. Both of these morphological traits—a dominant spiral arm and the offset bar—are typically characteristics of aMagellanic spiral galaxy.[8] The galaxy is inclined at an angle of 55° to the line of sight along aposition angle of 102°.[3]
The NGC 925 is a member of theNGC 1023 Group, a nearby,gravitationally-boundgroup of galaxies associated withNGC 1023.[5] However, the nearest member lies at least 650,000 ly (200,000 pc) distant from NGC 925. There is a 10 millionsolar mass (M☉) cloud ofneutral hydrogen attached to NGC 925 by a streamer. It is uncertain whether this is a satellitedwarf galaxy, the remnant of a pasttidal interaction, or a cloud of primordial gas.[9]
Although nosupernovae have been observed in NGC 925 yet, aluminous red nova, designated AT 2023nzt (type LRN, mag. 19), was discovered on 26 July 2023.[10]
Media related toNGC 925 at Wikimedia Commons
