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Caught very early (mag 17.4 last night) by ATLAS but if type Ia could perhaps reach ~mag 12 (eg SN 1960R B mag 11.7)CheersRobin
Robin,
M85 is getting low in a bright sky but this is an image from a few minutes ago showing the SN. It doesn’t seem much brighter (Astrometrica gives 17.5 unfiltered using Gaia DR2 G and an unfiltered KAF-6303 CCD).
Very low over my roof – first image could not see it at all.
Extremely poor seeing. Single image, 600 seconds, 10″ reflector
Now classified as a Ia but the classifiers suggest it could be a subluminous supernova around/post maximum light rather than caught early.
https://wis-tns.weizmann.ac.il/object/2020nlb
It seems odd in that case though that it was not visible to ATLAS 2 days previously
https://wis-tns.weizmann.ac.il/astronotes/astronote/2020-126
(hopefully link not mangled this time !)
Looks like this is brightening significantly – https://www.virtualtelescope.eu/2020/06/29/supernova-sn-2020nlb-in-messier-85-is-rising-an-image-28-june-2020/ put it at Mag 14.4 (June 28.8707).
I see there is a non detection by Koichi Itagaki at >mag 18.5 20200624.570 just 16 hours before the ATLAS discovery so definitely young
https://www.flickr.com/photos/snimages/50048748781/
his latest estimate 20200626.514 is 16.1 C
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