NGC 1325 explained

NGC 1325 is a flocculent spiral galaxy situated in the constellation of Eridanus. Located about 75 million light years away, it is a member of the Eridanus cluster of galaxies, a cluster of about 200 galaxies. It was discovered by William Herschel on 19 December 1799.

NGC 1325 has a Hubble classification of SBbc, which indicates it is a barred spiral galaxy with moderately wound arms. Its angular size on the night sky is 4.5' x 1.7'. The disk of the galaxy is inclined at an angle of 71° with the main axis aligned along a position angle of 232°. The rotation curve for the galaxy is flat across much of the radius from the core. The galaxy is moving away from the Milky Way with a heliocentric radial velocity of 1,588 km/s.

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 . Designated with a magnitude of 14.6, it was positioned east and north of the galactic nucleus. The color of this supernova and the rapid decline of the lightcurve suggest it was a type II supernova.
• SN 2021yja (type II-P or typeIc, mag. 15.334) was discovered by ATLAS on September 8, 2021.^[1] A core-collapse supernova, it was initially categorized as a type II, but may instead be a type Ic.

Notes and References

1. Web site: Transient Name Server . SN2021yja . . 2 December 2024.