Requesting photometric measurements of a new SN

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Simongini, Andrea

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Jul 9, 2026, 3:31:24 AMJul 9
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Dear BHTOM colleagues, 

My name is Andrea Simongini, currently a PhD student at INAF-Rome. I'm working on multi-wavelength follow-ups of close SNe in the high-energy regime. 
The Universe just gave us a very close new event, visible from the northern hemisphere.  

SN 2026sqf, discovered yesterday in NGC 3310 at 10.66 Mpc, being within the 1% of the closest SNe II discovered since 2016. Moreover (see attached image), it is showing flash ionization features, indicating ongoing circumstellar interaction, mildy reminding me of SN2023ixf. 

I believe it is an interesting target for SNe enjoyers of BHTOM and I highly encourage optical follow-up to monitor the ongoing evolution. 

Cheers, 
Andrea 


Astro-COLIBRI_SN2026sqf_SN_II_created2026-07-08.png
image.png


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Andrea Simongini
INAF - PhD Student
Osservatorio Astronomico di Roma, Monteporzio Catone (RM)
ITALY
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"Caelum non animum mutant qui trans mare currunt"

Josch Hambsch

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Jul 10, 2026, 7:27:58 AMJul 10
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Hi,

I have started followint the new SN in NGC 3310. First data have been uploaded to the AAVSO database and images are ready to be downloaded for BHTOM.

Regards,

F.-J. (Josch) Hambsch

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