| 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. |
| M52 (NGC7654) / Open Cluster, type e, II 2 r |
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| R.A. | 23h 24m 12.0s (2000.0) |
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| Dec. | +61° 35' 00" (2000.0) |
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| Apparent Size | 12' |
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| Real Size | 13 light yrs. |
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| # of Stars | 100 |
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| Magnitude | 7.3 |
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| Distance | 3810 light yrs. |
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| NGC7635 / Diffused Nebula, type 1 E |
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| R.A. | 23h 20m 40.0s (2000.0) |
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| Dec. | +61° 12' 00" (2000.0) |
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| Apparent Size | 16×6' |
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| Real Size | 20 light yrs. |
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| Magnitude | - |
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| Distance | 12400 light yrs. |
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| Other IDs | SH2 -162, LBN548 |
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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
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