Deep Sky Object in Summer
M71 (Globular Cluster in Sagitta)


Date & Time: May 4 2013, from 24:49 to 25:29 JST(+0900)
Composed 6 shots with 8 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with 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...ISO1600


M71 (NGC6838) / Globular Cluster
R.A.19h 53m 48.0s (2000.0)
Dec.+18° 47' 00" (2000.0)
Apparent Size6.1'
Real Size32 light yrs.
Magnitude9.0
Distance18,000 light yrs.
M71 is found between delta and gamma Sagittae and slightly south. This celestial body is classified as a globular cluster with a size of 6 arc minutes, but it looks more like a crowded open cluster. You can detect the individual stars with only small scopes.
The cluster has a magnitude of about 9 and 18 thousand light years away. It's fairly easy to find that with binoculars in the clear asterism of the Arrow.



M62
M75

Copyright(c) 2013 by Naoyuki Kurita, All rights reserved.
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