Monday, December 12, 2011

Open Cluster 12/11/11


The Double Cluster, NGC 869 and NGC 844.  Because the 14 is currently ALT-AZ mounted, exposures  have to be short due to field rotation.  This is a single, 30 second exposure--about the maximum before field rotation becomes a problem.  I'll also post an image of a stack, showing the field rotation of the star field.  The only real solution is to mount the scope on a wedge.  I will be mounting the 14 on an ultrawedge in the next week or so.
By at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

The Horsehead Nebula

This image of the Horsehead Nebula consists of just over 4 hours of total integration time. Stacked and processed in Siril, GraXpert, Affini...

  • "Deforking" an ETX
    I had a couple of emails asking how to defork an ETX telescope. The ETX 90 and ETX 125 were optically superb scopes, but the mounts left a...
  • Messier 106
     After a long break due to an extended period of cloud and rain here in the Carolinas, I was finally able to get some imaging time. As it...
  • News Update
    To add insult to injury, not only are the skies cloudy, but it is snowing.  The forecast is that it will end by noon, but I'm not hopefu...