Supernova SN 2024ggi
and its progenitor
 in NGC 3621


To date, it is the brightest supernova of 2024.



The supernova was discovered by ATLAS on 11 April 2024.

More information and images here:

All supernovae updates here:

TNS [Transient Name Server] entry for 2024ggi :

Wikipedia page for NGC 3621:


The candidate progenitor of SN 2024ggi can be found in the Hubble Picture of the week posted on 14 October 2013.

Note:  In this image, north is 69.0 right of vertical.


SN 2024ggi progenitor


The red star in the center [the candidate progenitor] has previously been cataloged by the VISTA Hemisphere Survey as VHS J111822.09-325015.2

It was also cataloged in the Hubble Source Catalog for NGC 3621 as
 MatchID 140066549 with coordinates RA 169.59202035259474 , DEC -32.83757282765759

Compare with the published coordinates of SN 2024ggi : RA 169.592030529 , DEC -32.8375756395

The difference is RA 0.00001017640526 , DEC 0.00000281184241 , which is about .038 seconds of arc.


Another view of the candidate progenitor dated 2003-02-03.  Note, in this view, North is up.

This screenshot comes from the Hubble Legacy Archive from this URL.

SN 2024ggi progenitor


Another view of the candidate progenitor dated 1994-12-27.  Note: In this screenshot, North is up.

This screenshot comes from the Hubble Legacy Archive from this URL.  Note:  In the archive image, South is up.

SN 2024 progenitor



More discussion of the progenitor of SN 2024ggi at the following 3 links:


Further reading:

The Red Supergiant Progenitor of Type II Supernova 2024ggi by Danfeng Xiang et al., 14 May 2024

Early phase simultaneous multi-band observations of Type II supernova SN 2024ggi with Mephisto by Xinlei Chena et al., 13 May 2024

Early flash-ionization lines in SN 2024ggi revealed by high-resolution spectroscopy by Thallis Pessi et al., 3 May 2024.

SN 2024ggi in NGC 3621: Rising Ionization in a Nearby, CSM-Interacting Type II Supernova by Wynn Jacobson-Galan et al., 29 April 2024.

  The direct identification of core-collapse supernova progenitors by Schuyler D. Van Dyk , 18 September 2017.



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