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Thursday, June 2, 2011

A panorama from the Sharpless 221 to 216




While making scale studies from various objects, I did make some new panoramas from archived images.
I will publish some of them as an individual images, comments and suggestions are welcome.


Sharpless panorama, Sh2-216, 217, 219, 221 and BFS44 
East of constellation Camelopardalis


Image is in HST-palette from an emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.


There are two individual images used to make this panoramic view:



  1. Left side, http://astroanarchy.blogspot.com/2011/01/two-ways-to-end-life-planetary-nebula.html
  2. Right side, http://astroanarchy.blogspot.com/2011/02/sh2-216-project-finalized.html

This image covers over six degrees of sky horizontally, that's 12 full Moons side by side. Here is a "scale study out of this target, the Moon is marked as a gray circle:



A natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission. Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.This composition is very close to a visual spectrum.
Note. Size of the full Moon is marked as a gray circle, at lower Right corner, for a scale.


An annotated image shows objects in the field


There are very little information out of objects in the image and there is very few images from them generally.
I think, this must be the first three band narrowband image out of this field.

Objects in this image are spread out over wide range of distances. They are not forming a single complex, like the Cassiopeia arc west of Camelopardalis. The largest objects in a field are Sharpless 221 and 216.

First from the Left is a supernova remnant, SNR 160.4+02.8 (Sh 2-221) , the distance is unknown. 
The Planetary Nebula,  PK 158+00 1 (Sh 2-216) , at Right end of an image, distance of only 120 parsecs (~390 light years) makes this to a one of the oldes and largest planetary nebula known.

Smaller objects in a field are Sh2-217, 4100 solar mass molecular cloud at distance of 5200 parsecs (0ver 16.000 light years) and Sh2-219, an HII region at distance of 4200 parsecs (Over 13.000 light years)
Last object BFS44, at bottom center, located at distance of 6100 parsecs (over 19.000 light years), almost nothing has been published from this object.

Source for information above, galaxymap.org, http://galaxymap.org/drupal/node/44








www.tips-fb.com Posted by J-P Metsavainio at 11:58 AM
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