Dark Horse Observatory

Dark Horse Observatory
Kimberton, PA US


Image Details: M005

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Object/Name: M005 (NGC 5904, SAC8103, Bedford538) Image Details:
Type: Globular Cluster Red:5.00 min. (6) – 30.00 min. 1x1
Constellation: Serpens (Caput) Green:5.00 min. (6) – 30.00 min. 1x1
RA: 15 hours 18.5 minutes Blue:5.00 min. (6) – 30.00 min. 1x1
Dec: +2 degreees Luminance:5.00 min. (10) – 50.00 min. 1x1
Distance: 25,000.0 light years Total Time:140 minutes
Magnitude: 5.7 mag   
Size: 22.0 x 22.0 arc minutes   
Imaging Dates: 18 May 2012   
Location: Dark Horse Observatory, Kimberton, PA 19460 U.S.A.   
Telescope: Takahashi BRC-250 Mount: Astelco NTM 500
Focuser: FLI DF2 Rotator: Optec Pyxis (2”)
CCD: SBIG ST-10XME Filterwheel: SBIG CFW-10
Filters: Astrodon Series E   
Software Used:
  MaximDL FocusMax
The Sky 6: CCDAutoPilot4 CCDStack
PS CS3 Noel Carboni’s Photoshop Tools
PixInsight Topaz Labs Tools (Denoise 5, Detail 2, and Infocus)
Detailed Information:
M005 is a globular cluster located between the constellation Libra and Serpens. It was first discovered by Gotfried Kirch in 1702, but was first observed and catalogued by Charles Messier on 23 May 1764. Visually this is a beautiful example of a globular cluster with a compressed core in contrast to its looser exterior regions. Under dark skies this is visible to the naked eye. It shines at around 5.7 magnitude with stars ranging from 11th to 15th magnitude. It is 25,000 light years distant. When viewed through a telescope this globular cluster demonstrates color with a straw-colored interior and a powder-bue exterior. This globular cluster is estimated to be 13 billion years old. Something not well seen in this image is that four degrees due west of M5 there are at least eight galaxies visible at even low or moderate powers.

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