Messier 15 regio

 messier-15-regio-for-site Explanation: The image shows a region around globular cluster Messier 15 in Pegasus. 40,000 light-years away in the constellation Pegasus, M15 also cataloged as NGC 7078 is one of the most densely packed globular star clusters in our Milky Way Galaxy. Like most globulars, M15 is filled with ancient stars, about 12 billion years old compared to the Sun’s estimated 4.5 billion years. Unlike most globulars, into there’s a planetary nebula, the briefly visible gaseous shroud of a dying star cataloged as Kuestner 648. Prospectively near Messier 15 (actually thousands of light-years closer to Earth) is detectable (noted in the image below) the star Tyc 1127-1664-3 (BD + 11 4571, HIP106074)) of magn +11.54 spectral class K3 coordinates ar 21 29 +12 10 58 07.03863 dec.   m15_annotated-for-site This star located at a distance of about 185 light years from our planet has an incredible proper motion. In fact, comparing my picture taken in the days of 26-27-28 August 2016 with that of the DSS the shift is clearly visible!

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Optics:Celestron 11 HD hyperstar mode (f 1.9) & (f6.3)
Mount:Avalon M3 Fast Reverse
Camera:SX H694 binning 1x (-5°)
Filters: Baader IR/UV cut, Red, Blue
Guiding Systems: Off Axis Guide Proxima LB Astro & Lodestar X2 , ASI 178M
Dates/Times: 26-27-28 August  2016, 09 sept. 2016
Location: W.Herschel obs. Viterbo
Exposure Details: lum 480 min @ f1.9 + 156 min @ f6,3  crominance: 40min (red) 66min (blue) green (blue/red)
Cooling Details: – 5 degree
Acquisition: Astroart, Sequence Generator Pro, PHD2 Guiding, Chartes Du Ciel, Avalon Star Go  
Processing: Astroart, IRIS, PS5
Mean FWHM: 3,8
SQM-L: 19,8

 

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