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Image Details: M011 - The Wild Duck Cluster

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M011 - The Wild Duck Cluster

Object/Name: M011 (NGC 6705, The Wild Duck Cluster) Image Details:
Type: Open Cluster - Trumpler Class I 2 r Luminance IRB:5.00 min. (15) – 75.00 min. 1x1
Constellation: Scutum Luminance IRB:0.00 min. (20) – 0.00 min. 1x1
RA: 18 hours 51.1 minutes Red:5.00 min. (8) – 40.00 min. 1x1
Dec: +6 degreees 16 minutes Green:5.00 min. (8) – 40.00 min. 1x1
Distance: 5,460.0 light years Blue:5.00 min. (8) – 40.00 min. 1x1
Magnitude: 5.8 mag Total Time:195 minutes
Size: 13.0 x 13.0 arc minutes   
Imaging Dates: 15 - 25 July 2008   
Location: Dark Horse Observatory, Kimberton, PA 19460 U.S.A.   
Telescope: Takahashi BRC-250 Mount: Mountain Instruments MI-250
CCD: SBIG ST-10XME Rotator: Optec Pxyis Rotator
Focuser: Finger Lakes Instruments DF2 Filters: Astrodon Series E
Software Used:
  CCDStack MiraPro Professional
Photoshop CS2 Russel Croman’s Gradient Xterminator
Noel Carboni’s Astronomy Tools  
Detailed Information:
This is a small (13 arc sec) but extremely rich open cluster. It has many bright stars that caused multiple blooms on the luminance images taken to create this LRBG image. For that reason I combined 20 short luminance exposures in CCDStack to repair the regions under the blooms of the longer exposures.

This open cluster was first observed by Gottfried Kirch on 1 September 1681, and it was added by Messier to his list on 30 May 1764. The name, The Wild Duck Cluster, came from a reference to it resemblance to a "flight of wild ducks" in the description by Admiral W.H. Smyth. While its appearance could almost be thought to resemble a loose globular cluster and, in fact, some older texts have considered it to be a globular cluster. Recent evidence confirms that it is indeed and open cluster. Recent estimates of its age place it around 150 million years old.

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