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Supernova SN 2020nlb in M85

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#1 Dave Mitsky

Dave Mitsky

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Posted 14 July 2020 - 02:44 PM

My wife and I drove to the Naylor Observatory last night so that I could use the observatory's 17" f/15 classical Cassegrain to observe the bright supernova SN 2020nlb in M85, a task in which I was successful.  By doing so, we gave up a chance of seeing Comet NEOWISE F3 in the evening sky, since the northwestern horizon is far from ideal at the observatory.

 

I was able to see M104 during twilight, which boded well for viewing the far-higher-in-altitude M85.  The 12th-magnitude Type 1a supernova was really quite easy to see.  I used magnifications of 170, 259, and 324x, with 259x providing the best view.  

http://www.rochester...y.org/snimages/

 

2020nlb (= ATLAS20qoq), TNS discovered 2020/06/25.251 by ATLAS
Found in M85 at R.A. = 12h25m24s.181, Decl. = +18°12'12".52
Located 1".0 east and 43".2 north of the center of M85 (Gianluca Masi image)
Mag 12.2:7/4 and rising, Type Ia (References: AstroNote 2020-127, AstroNote 2020-126)

 

There's an excellent image of the supernova posted at https://www.flickr.c...es/50081274267/

I also observed Jupiter, Saturn, M11, M5, and Alcor-Mizar and did a bit of binocular observing before calling it an early night.  
 


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#2 Dave Mitsky

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Posted 14 July 2020 - 03:20 PM

SN 2020nlb was discovered by the ATLAS (Asteroid Terrestrial-impact Last Alert System) Project.

 

https://fallingstar.com/home.php


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#3 Pete W

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Posted 15 July 2020 - 04:29 PM

The M85 SN was obvious in my old 6" RV-6 @ 160X this past Sat. night (July 11).  A smidge brighter than the nearby field star.  Also took a peek at the SN in NGC4457.  More of a challenge being super close to the galaxy's bright nucleus; needed about 200x to clearly pull it out....seemed fainter than M85's though its listed mag is/was brighter.


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