Deep Sky Object in Summer
M92 (Globular Cluster in Hercules)
|Date & Time: ||Mar 19 2005, from 25:56 to 26:24 JST(+0900)
|Composed 4shots with 7 minutes & 4shots with 1 minutes exposed|
|Optical: ||VIXEN 20cm(3.9") VISAC (f=1800mm, F9.0)
|Auto-guided with TAKAHASHI JP Equatorial & Meade Pictor 201XT
|Digital Camera: ||Nikon D70 (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording Format...12bit CCD-RAW, converted to 8bit TIFF(3008×2000)|
M92 (NGC6341) is a medium-sized globular cluster lies on a line between eta and iota Herculis.
The cluster is much smaller than M13, The Hercules Cluster, but has a brighter nucleus than the representative globular cluster in summer skies,
can easily be detected by binoculars.
You'll be able to appreciate M92 like a dimmed nebula with ellipse shape, should need a telescope larger than 20cm(7.8") to resolve individual stars.
The cluster has a diameter of 8.3 arc minute and a distance of about 36 thousand light years.
|M92 (NGC6341) / Globular Cluster, type IV|
|R.A.||17h 17m 5.9s (2000.0)|
|Dec.||+43° 08' 00" (2000.0)|
|Real Size||88 light yrs.|
|Distance||36,000 light yrs.|