Comet Hartley and the Double Cluster

on Sunday, October 10, 2010
  • Lexington, Mass. Suburban skies; 50-45F, low humidity and clear; comet high in the sky
  • October 8, 2010, 12:24am to 3.54am; in the image above, the comet is located at its 12:24am position (see explanation below)
  • Takahashi E160 astrograph (6" F/3.3) with field flattener and CLS Astronomik filter
  • Image scale is about 1.5deg x 2.0deg
  • Takahashi EM-1 mount; unguided; tracking stars
  • Canon 450D (modified by Hap Griffin)
  • 84 subs of 120sec each (total exposure 2h 48m); 1600 ISO
  • 20 darks, 20 flats, 20 bias files; processed as usual
  • Captured with Mike Unsold's ImagesPlus 4.0; processed with ImagesPlus 3.82, Photoshop C4, and Noise Ninja
  • Procedure: (1) comet aligned and stacked; (2) stars aligned and stacked; (3) images blurred and recombined as explained below.
  • Explanation of procedure: Same general procedure as for described for Comet NcNaught here: The procedure was developed by Bernhard Hubl.
  • Tags: Comet
    To leave a comment you must be a member of our community.
    Login to your account now, or register for an account to start participating.
    No one has commented yet.
    Join our Community!

    Our community is FREE to join. To participate you must either login or register for an account.


    Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. View our Privacy Policy.

    Find us on Facebook