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New Year Supernova!

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#1 Edward E

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Posted 31 December 2012 - 03:06 PM

I just saw that the Bright Supernova web site has posted a "new" Supernova in NGC 3447 in Leo, designation 2012ht. The SN was "discovered" on 20121218 and is listed at mag 12.8. So, Ring in the New Year by observing a SN in Leo and to everyone a Happy New Year!

SN 2012ht

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#2 Edward E

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Posted 31 December 2012 - 03:08 PM

Close up of NGC 3447 area; this and the prior map are from WIKISKY.ORG

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#3 Achernar

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Posted 31 December 2012 - 03:50 PM

The galaxy is a challenge object at best for many folks in light polluted areas, but those who have medium and large aperture telescopes will get a shot at the galaxy and the supernova in it. If the weather is favorable next weekend, I'll be looking for it.

Taras

#4 JayinUT

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Posted 01 January 2013 - 01:38 AM

If conditions allow this weekend or next I'll give it a go. It is up to the clouds.

#5 IVM

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Posted 01 January 2013 - 04:04 PM

Great! Leo is well positioned in the morning, and the galaxy (a John Herschel discovery) is actually a faint, but large contact interacting pair, Vorontsov-Velyaminov 252. The small EW-extended component NE of the core, which is visible in the above screenshot, is NGC 3447A. I wonder if it can be detected visually.

#6 ZielkeNightsky

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Posted 05 January 2013 - 11:44 AM

Hi all

Got an image jan. 4th. with a V filter. Mag. measured to 13.1 from 2 x 120 sec. exp.

There's also an another object close by that I can't identify. It not non any other image I can find. Any thoughts to what it could be?

Posted Image

Will try to get another image tonight.

#7 IVM

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Posted 05 January 2013 - 12:33 PM

I see an object on Wikisky that seems to be at that position (SW end of the cross of starlike objects NNW of the core). The colors suggest that it is either a superimposed star or a compact HII region.

#8 ZielkeNightsky

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Posted 05 January 2013 - 02:02 PM

I've made a blink comparison with a bunch of images, Palomar, DSS, recent sn2012HT images etc. An object of this kind I don't think is there. Maybe an artefact, variable ??

Blink comparison

#9 Astrojensen

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Posted 05 January 2013 - 02:58 PM

A slow-moving asteroid? The region is pretty close to the ecliptic.

If it is a second supernova, then...


Clear skies!
Thomas, Denmark

#10 IVM

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Posted 05 January 2013 - 04:11 PM

Nice blink comparison. Indeed the spot in question seems to be W of the star and star cloud that I meant, and the difference in brightness seems too large to be explained by the spectrum. An asteroid is a good guess.

#11 ZielkeNightsky

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Posted 05 January 2013 - 05:02 PM

Hhhhmm, no hit on minor planets or asteroids. Well I've planned some imaging within the next few hours.

#12 ZielkeNightsky

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Posted 05 January 2013 - 06:59 PM

Case solved. Some weird very faint reflection is the best guess.

Reflection

#13 Astrojensen

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Posted 06 January 2013 - 03:44 AM

Aww - and here I was waiting for another supernova announcement! :lol:


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Thomas, Denmark






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