Welcome to the Cockermouth Astronomical Society website. Hopefully you'll find all the information you need about our society and astronomy in West Cumbria here. If not contact us.

For more regular updates and members images why not join our Facebook page.

Friday, October 15

Comet Hartley & Double Cluster

Dodging the water-saturated skies (hair-dryer working every 10 minutes to de-mist the optics!) I managed to get a short series of frames to make a mosaic of Comet 103P_Hartley approaching the Double Cluster in Perseus (NGC 884 & NGC 869).

The image is compose of 5 frames, each made up of 6 x 1 minute exposures at ISO800, with the exception of the "comet frame" which is actually 6 x 2 minutes at ISO 1600 to bring out the coma in more detail.

All images are prime focus of the MN-190 giving an effective focal length of 1000mm f/5.3.

I have aligned the images on the stars rather than the comet nucleus, giving a pleasing background, but this does show the motion of the comet's nucleus over 12 minutes. Others have obtained images of a faint tail but this is not spectacular.


No comments:

Post a Comment