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Heart, Soul and a very blue star!

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Joined: 10/01/2013 - 12:11
Heart, Soul and a very blue star!

Posted by R J Andersson at 18:42 on 2013 May 24

Hi folks,Thought I'd share:[img size=1024]http://andersson-design.s3.amazonaws.com/astro/TEC/IC1805/Heart_1024_v5.... The Heart Nebula - IC1805[img size=1024]http://andersson-design.s3.amazonaws.com/astro/TEC/IC1848/Soul_Plus_Ha_W... The Soul Nebula - LBN 667I was fortunate enough to have the second image selected as an "Astronomy Picture of the Day" (link) last month.Both images were captured using 5 x 200 second subs in each of R, G and B plus 8 x 1500 second subs in Ha with my TEC 140 'scope plus an FLI ML16803 camera. Processing is described in this thread over on the PI forum. 2048x2048 pixel versions are available for both images, here and here respectively.The Soul Nebula RGB subs contained a surprise:[img size=800]http://andersson-design.s3.amazonaws.com/astro/TEC/IC1848/Soul_Crop_Inc_... star colours are pretty much what the RGB data indicated with no massive tweaks but that blue star is very blue indeed. Not the colour one might expect from a black body radiator. It took me a while to track it down but its designation is 2MASS J02574541+6034251 or Lan 272 for short. It's a "UV Bright" white dwarf with an estimated surface temperature of 90,410° K (source). You can find it at 02 57 45.41, +60 34 25.2.Bob.