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Observing >> Deep Sky Observing

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Edward E
scholastic sledgehammer
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Reged: 03/26/06

Loc: Tucson, Arizona
New Year Supernova! new
      #5598143 - 12/31/12 03:06 PM Attachment (45 downloads)

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

Edited by Edward E (12/31/12 03:10 PM)


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Edward E
scholastic sledgehammer
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Reged: 03/26/06

Loc: Tucson, Arizona
Re: New Year Supernova! new [Re: Edward E]
      #5598150 - 12/31/12 03:08 PM Attachment (55 downloads)

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

Edited by Edward E (12/31/12 03:09 PM)


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Achernar
Postmaster
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Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: New Year Supernova! new [Re: Edward E]
      #5598242 - 12/31/12 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


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JayinUT
I'm not Sleepy
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Reged: 09/19/08

Loc: Utah
Re: New Year Supernova! new [Re: Achernar]
      #5599034 - 01/01/13 01:38 AM

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

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IVM
Pooh-Bah


Reged: 01/07/08

Loc: Western New York
Re: New Year Supernova! new [Re: JayinUT]
      #5599890 - 01/01/13 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.

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ZielkeNightsky
Carpal Tunnel
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Reged: 10/01/06

Loc: Denmark
Re: SN2012ht image and unknown object new [Re: IVM]
      #5606416 - 01/05/13 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?



Will try to get another image tonight.


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IVM
Pooh-Bah


Reged: 01/07/08

Loc: Western New York
Re: SN2012ht image and unknown object new [Re: ZielkeNightsky]
      #5606512 - 01/05/13 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.

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ZielkeNightsky
Carpal Tunnel
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Reged: 10/01/06

Loc: Denmark
Re: SN2012ht image and unknown object new [Re: IVM]
      #5606689 - 01/05/13 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


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Astrojensen
Post Laureate
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Reged: 10/05/08

Loc: Bornholm, Denmark
Re: SN2012ht image and unknown object new [Re: ZielkeNightsky]
      #5606775 - 01/05/13 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


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IVM
Pooh-Bah


Reged: 01/07/08

Loc: Western New York
Re: SN2012ht image and unknown object new [Re: Astrojensen]
      #5606898 - 01/05/13 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.

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ZielkeNightsky
Carpal Tunnel
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Reged: 10/01/06

Loc: Denmark
Re: SN2012ht image and unknown object new [Re: IVM]
      #5606965 - 01/05/13 05:02 PM

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

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ZielkeNightsky
Carpal Tunnel
*****

Reged: 10/01/06

Loc: Denmark
Re: SN2012ht image and unknown object new [Re: ZielkeNightsky]
      #5607154 - 01/05/13 06:59 PM

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

Reflection

Edited by ZielkeNightsky (01/06/13 06:38 AM)


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Astrojensen
Post Laureate
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Reged: 10/05/08

Loc: Bornholm, Denmark
Re: SN2012ht image and unknown object [Re: ZielkeNightsky]
      #5607744 - 01/06/13 03:44 AM

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


Clear skies!
Thomas, Denmark


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