Deep Sky Object in Autumn
M30(Globular Cluster in Capricornus)
|Date & Time: ||Nov 22 2014, from 18:02 to 18:24 JST(+0900)
|Composed 6 shots with 4 minutes exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
|with BaaderPlanetarium Moon&Skyglow filter|
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Canon EOS 600D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
M30 is a tiny globular cluster about 7 degrees south of gamma Cap, positioned at the eastern edge of reverse triangle of Capricornus.
And a fifth magnitude star of 41 Cap is paralleling with M30, a good mark to search the cluster with finder scopes.
|M30 (NGC7099) / Globular Cluster, type V|
|R.A.||21h 40m 23.9s (2000.0)|
|Dec.||-23° 11' 00" (2000.0)|
|Real Size||75 light yrs.|
|Distance||41 thousand light yrs.|
The globular is very normal one without any mentioned characteristics. You can see it as a dimmed nebulosity with binoculars,
and perhaps it would be fairly difficult to resolve the member stars even if you use medium-sized telescopes with a magnifying power of 100 or so.
M30 has a real size of about 75 light years and about 40 thousand light years away.