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M51 SN2011dh - close up
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Default M51 SN2011dh - close up - 9th June 2011, 10:42 PM
Here is a comparison of two images of M51 taken with my C11 at f/6.3. The LH image taken on the night of 7th June through slightly hazy conditions showing the SN2011dh. I used a one shot colour ST2000XCM camera.

regards

Peter
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Click image for larger version Name: M51 SN2011dh 7 JunPE.jpg Views: 5449 Size: 171.0 KB ID: 60566  

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 09:45 AM
Surprised no one has commented on this - loads of details and a great record of the SN.. Great work.

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 09:54 AM
Peter this a great comparison showing the SN. Also some nice details within M51 - well done.

Mark

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:08 AM
This is a great comparison. Just a question if I may ............. We see the supernova in June of 2011 - When did it actually explode? How many years ago?

Sara

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:09 AM
Is that just a hot green pixel in the lower galaxy? Just below and to the right of the central formation where the dust clouds end?

If it's not it's something else that was absent in the 2008 image.

(Spotted another just above the core of the main galaxy below the red star to the left of the supernova)
Last edited by blackparticle; 10th June 2011 at 10:16 AM.
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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:10 AM
Quote:
Originally Posted by swag72 View Post
This is a great comparison. Just a question if I may ............. We see the supernova in June of 2011 - When did it actually explode? How many years ago?

Somewhere between 19 and 27 million years ago.
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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:11 AM
It went bang 23milion years and 7 days ago.

Derek

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:13 AM
Just a while ago then!!

Sara

Laugh at my astro attempts on flickr

Scopes: Skywatcher Evostar 120ED DS-Pro with orange moonlite focuser / Pentax 75 SDHF
Mount: HEQ5 Pro synscan, EQMOD
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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 11:48 AM
Great side by side of the big far away event.

John.

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 12:51 PM
Thanks everyone, blackparticle yes that is a hot green pixel, I missed that one!

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Default 10th June 2011, 01:09 PM
Lovely image!

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 01:42 PM
lovely sharp detailed images

i justify my recent purchases, against the fact that it will help the rebel alliance acquire particle beam weapon technology, crucial for the eventual destruction of the evil death star!!!!

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 08:19 PM
Quote:
Originally Posted by astroman001 View Post
Thanks everyone, blackparticle yes that is a hot green pixel, I missed that one!
Heh. No worries.

What do people generally do to compare images to check for deviations? Difference overlays in Photoshop or is there some software that specifically checks astro images?

I can't remember what documentary I watched a few weeks ago but they were going on about stars that may disappear without going Supernova. I imagine 'finding" one of those would be really tricky.
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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 08:49 PM
Nice presentation next to each other, nice captures as well

Fay

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:39 PM
Quote:
Originally Posted by rfdesigner View Post
It went bang 23milion years and 7 days ago.

Derek
from the point of view of the photons that come here, no time at all has passed....sometimes I like to look at things from a photon's point of view...
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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 10:41 PM
Nice comparison

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Re: M51 SN2011dh - close up
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Default Re: M51 SN2011dh - close up - 10th June 2011, 11:42 PM
Oooooh, I like that!

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