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Messier 13, Hercules globular cluster

One of my favorite objects to visit is the Hercules globular cluster M13. It is a stunning object to view when you are at a dark sky site and the sky is transparent. Image of globular cluster M13 in constellation Hercules.

Below image taken from light polluted metro Denver with a Celestron Nexstar11 telescope, Meade F3.3 focal reducer, and Astrovid Stellacam II video camera. Intregration set at 128 (4.25 sec), gain 9/14, and medium gamma. Stacked from 20 minutes of video, dark subtracted, flat field and bias corrected. Sky was clear, temperature was 56 °F, no wind, transparency very good, and turbulence fair (5 to 6/10).

This entry was posted on Tuesday, May 16th, 2006 at 12:27 pm and is filed under Astronomy, Deep sky, Globular Cluster. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

3 Responses to “Messier 13, Hercules globular cluster”

  1. Marc Says:
    May 17th, 2006 at 7:17 am

    Hi Vern,

    This picture is really great, very impressive shot of m-13. Can you count the stars for me and let me know how many you came up with.

    Marc

  2. Vern Says:
    May 17th, 2006 at 9:24 am

    100314

  3. Brian Says:
    May 20th, 2006 at 4:25 am

    Well assuming you were so good and only counted a new one every second it would take you just over 27 hours to count them assuming you didnt take a break

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