Deep Sky Object in Summer
M22 (Globular Cluster in Sagittarius)
|Date & Time: ||Apr 28 2007, from 27:16 to 27:33 JST(+0900)
|Composed 4 shots with 5 minutes exposed|
|Optical: ||TAKAHASHI 12.5cm(4.9") fluorite refractor (f=1000mm, F8.0)
|Auto-guided with VIXEN ATLUX Equatorial & Meade Pictor 201XT
|Digital Camera: ||Fujifilm FinePix S2 Pro
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3024×2016)|
|CCD Sensitivity...ISO800, White Balance...Auto|
M22 (NGC6656) is a fine globular cluster, lies two degrees NE of lambda Sgr.
The cluster is detected by naked eye under good condition, and looks like a dimmed nebula with binoculars.
It is a highly concentrated group of about 70 thousand stars in total, about 10,000 light years away.
|M22 (NGC6656) / Globular Cluster, type VII|
|R.A.||18h 36m 23.9s (2000.0)|
|Dec.||-23° 54' 00" (2000.0)|
|Real Size||111 light yrs.|
|Distance||10,000 light yrs.|
The cluster and M13, a great globular cluster in Hercules, have the culmination about simultaneously,
It'll be very interesting to compare views of those clusters through a telescope.
-->Jump to Rendezvous of M22 with the Jupiter