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)
CCD Sensitivity...ISO1600

M92 (NGC6341) / Globular Cluster, type IV
R.A.17h 17m 5.9s (2000.0)
Dec.+43° 08' 00" (2000.0)
Apparent Size8.3'
Real Size88 light yrs.
Distance36,000 light yrs.
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.



Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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