Supernova SN 2025pht   
and its progenitor
 in NGC 1637

This is the brightest supernova of 2025, so far.

The supernova was discovered by ASAS-SN on 29 June 2025, and classified as a Type II-P supernova on 3 July 2025.

More information and images here (coming soon?) : https://rochesterastronomy.org/sn2025/sn2025pht.html

All supernovae updates here: https://rochesterastronomy.org/snimages/index.html

TNS [Transient Name Server] entry for 2025ph: https://www.wis-tns.org/object/2025pht

Wikipedia page for host galaxy NGC 1637: https://en.wikipedia.org/wiki/NGC_1637

NGC 1637 was also the home of the brightest supernova of 1999, SN 1999em.

The candidate progenitor of SN 2025pht can be found in the Hubble Picture of the week posted on 2 December 2024.

Note:  In this image, north is 21.9° right of vertical. It has been rotated 90° clockwise from the original image.

The presumed progenitor has been cataloged in the Hubble Source Catalog for NGC 1637 as

MatchID 1150202 with coordinates RA 04:41:28.838 DEC -02:51:56.01

Further reading:

None yet

Page created: 29 June 2025

Last update: 3 July 2025