Deep Sky Object in Summer
NGC6940 (Open Cluster in Vulpecula)

Date & Time: Jul 26 2014, from 24:58 to 25:13 JST(+0900)
Composed 4 shots with 5 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-P1 light-pollution suppression filter
Auto-guided with TAKAHASHI EM-200 Equatorial & Meade Pictor 201XT
Digital Camera: Canon EOS 600D (Remodeled)
Location: Koumi town, Nagano pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
CCD Sensitivity...ISO1600

NGC6940 / Open Cluster, type e, III 2 r
R.A.20h 34m 36.0s (2000.0)
Dec.+28° 18' 00" (2000.0)
Apparent Size20'
Real Size55 light yrs.
# of Stars60
Distance9380 light yrs.
NGC6940 is an open cluster of about a hundred stars, found at about 4 degrees SW of the veil nebula in Cygnus. The cluster is unexpectedly striking because it's positioned in front of dark nebula in summer's Milky Way. You can appreciate the cluster with faint stars gathering dense in semicircle; it'll be a splendid view.
The cluster is about 9400 light years away from the solar system.



Copyright(c) 2014 by Naoyuki Kurita, All rights reserved.
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