Comet 21P/Giacobini-Zinner
Taken by Roman Kulesza on August 24, 2018 @ Tiny Twp. Ontario , Canada
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Date Taken: 2018:08:24 17:22:31
  
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Framed for long tail ;) In second -right image I was looking for tail so I stretched twice the image , first in MaxIm using DDP and second time in PS - Dynamic Enhance /screen blending/ but not much to see yet :(. Taken morning after Moon Set , 30 sub frames , 60 sec each stack in DSS ,TS 130 mm APO refractor and my old Xsi set to ISO 1600 . Thanks for looking ...
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Roman,

These are interesting images, they both show a green coma ahead of the comet nucleus and then an almost purple looking dust tail behind the comet. Michael Jaegers Gif also shows that green coma ahead of the nucleus and then a purple colored dust tail. Maybe someone who understands the dynamics of comets can tell us what we are seeing in your images. The trailed stars show some nice color in your images. What is the field of view of your images? Very well done.

Mike Olason
Posted by Icylander2 2018-08-24 22:52:00
Mike , I appreciate Your comments, thanks :) Ill post your question on Comet group for professional astronomers and I like to know my self why sometimes we can see only red - purple dark dusty Tail - Dusty Comet ? Stars show nice color because this is hi quality APO refractor /SR 99.4/ and is no dew on the lens when I am taking pictures . I own two 8 and 10 inch Newtonians , one with R. Royce mirror but in my place with humidity close to 100 % mirrors always cover by dew . FOV - with 130 mm at F/7 and small sensor in Canon Xsi camera is over 1 degree 56 x 84 arcmin and scale 1.18 arcsec/pix. Thanks for asking . I hope the show just begin and comet will be more active - in next few weeks. With warm Regards . Roman
Posted by astroromi 2018-08-25 09:47:42
 
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