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)
Sensitivity...ISO3200




M30 (NGC7099) / Globular Cluster, type V
R.A.21h 40m 23.9s (2000.0)
Dec.-23° 11' 00" (2000.0)
Apparent Size5.7'
Real Size75 light yrs.
Magnitude6.4
Distance41 thousand light yrs.
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.
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.




M15

M72 & M73


Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Autumn index Capricornus