NGC 1325
Galaxy in the constellation Eridanus
From Wikipedia, the free encyclopedia
NGC 1325 is a flocculent spiral galaxy situated in the constellation of Eridanus. Located about 75 million light years away,[2] it is a member of the Eridanus Cluster of galaxies,[3] a cluster of about 200 galaxies. It was discovered by William Herschel on 19 December 1799.
| NGC 1325 | |
|---|---|
Hubble Space Telescope image of NGC 1325 | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03h 25.576m [1] |
| Declination | −21° 32′ 38.61″[1] |
| Heliocentric radial velocity | 1,588[2] |
| Distance | 75.0 Mly (23.01 Mpc)h−1 0.73[2] |
| Group or cluster | Eridanus Cluster[3] |
| Apparent magnitude (V) | 11.5[4] |
| Characteristics | |
| Type | SBbc[5] |
| Apparent size (V) | 4.47′ × 1.66′[5] |
| Notable features | Flocculent spiral galaxy |
| Other designations | |
| IRAS 03221-2143, NGC 1325, UGCA 70, PGC 12737, ESO 548-7, MCG -4-9-4[5] | |
References: [6] | |
NGC 1325 has a Hubble classification of SBbc, which indicates it is a barred spiral galaxy with moderately wound arms.[5] Its angular size on the night sky is 4.5' x 1.7'.[5] The disk of the galaxy is inclined at an angle of 71° with the main axis aligned along a position angle of 232°.[3] The rotation curve for the galaxy is flat across much of the radius from the core.[7] The galaxy is moving away from the Milky Way with a heliocentric radial velocity of 1,588 km/s.[2]
Supernovae
Two supernovae have been observed in NGC 1325:
- SN 1975S was discovered by Justus Dunlap and Yvonne Dunlap at Corralitos Observatory on 30 December 1975 .[8] Designated with a magnitude of 14.6,[9] it was positioned 53″ east and 77″ north of the galactic nucleus. The color of this supernova and the rapid decline of the lightcurve suggest it was a Type II supernova.[10]
- SN 2021yja (Type II-P or Type Ic, mag. 15.334) was discovered by ATLAS on September 8, 2021.[11] A core-collapse supernova,[12] it was initially categorized as a Type II, but may instead be a Type Ic.[13]
