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)|
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.
|M71 (NGC6838) / Globular Cluster|
|R.A.||19h 53m 48.0s (2000.0)|
|Dec.||+18° 47' 00" (2000.0)|
|Real Size||32 light yrs.|
|Distance||18,000 light yrs.|
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.