NGC 1325

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]