TNS Classification Report No. 22158 [ 2025TNSCR4015....1S ]

Date Received (UTC): 2025-10-05 21:46:53
Sender: Brian Schmidt
Group: Supernova Alliance

B. Schmidt (ANU), K. Auchettl (University of Melbourne/UCSC), C. Lidman (ANU), B. Martin (ANU), Anais Moller (Swinburne), L. Rauf (ANU), Sara Romagnoli (University of Melbourne), Jennifer Shi (University of Melbourne), and B. E. Tucker (ANU) report/s a classification of object: SN 2025ymy

Type: SN II
Redshift: 0.0175

Remarks: young SN II similar to 1999em at 1 week post explosion

The following Classification spectrum was provided:

Obsdate: 2025-10-04 10:09:24
Instrument: WiFeS
Telescope: ANU 2.3m Advanced Technology Telescope

Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2025ymy