Deep Sky Object in Autumn
M52 & Bubble Nebula (Open Cluster & Diffused Nebula in Cassiopeia)

Click on image to enlarge

Date & Time: Sep 28 2013, from 23:02 to 23:54 JST(+0900)
Composed 6 shots with 10 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon with conversion lens (f=742mm, F4.6)
with IDAS LPS-P2-FF Light-pollution suppression filter
Auto-guided with TAKAHASHI JP equatorial & SBIG STV
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)

M52 (NGC7654) / Open Cluster, type e, II 2 r
R.A.23h 24m 12.0s (2000.0)
Dec.+61° 35' 00" (2000.0)
Apparent Size12'
Real Size13 light yrs.
# of Stars100
Distance3810 light yrs.
NGC7635 / Diffused Nebula, type 1 E
R.A.23h 20m 40.0s (2000.0)
Dec.+61° 12' 00" (2000.0)
Apparent Size16×6'
Real Size20 light yrs.
Distance12400 light yrs.
Other IDsSH2 -162, LBN548
Please try to draw a line from alpha Cas. to beta Cas, then continue this line, doubling its length. You'll be able to find out a beautiful open cluster M52 (NGC7654) in your field of vision. The cluster contains about 100 faint stars gathering like a semicircle, 3800 light years away.
This picture shows you another notable object called "Bubble Nebula", NGC7635. As a magnified image below shows us, the nebula has a well-proportioned circle structure around the center. It's considered that a supernova explosion in the nebula has formed the characteristic structure. This reddish nebula isn't so well known, but it can be captured with M52, and have made a lively and interesting field in autumn sky. A small diffused nebula in right hand side is NGC7538.

Jump to close-up image of NGC7635
Jump to wide-field image around M52, NGC7635 & Sh2-157



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