Deep Sky Object in Autumn
Around Sh2-157 (Diffused Nebula in Cassiopeia)

Click on image to enlarge

Date & Time: Aug 15 2020, from 22:51 to 24:34 JST(+0900)
Mosaic of 2 flames of 5min.×10shots
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN
Digital Camera: Canon EOS 6D (Remodeled)
Location: Koumi town, Nagano pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5472×3648)
Device Size...36×24mm, Sensitivity...ISO1600

This picture shows you a field that includes several diffused nebulae between Cassiopeia and Cepheus. The nebula spread out in southern region of this image is Sh2-157. The nebula has a span of a degree and a bright nucleus in center with a number of Sh2-157a. You can see a characteristic figure with indistinct loops in northern region.
And in northern region of the field have small nebulae of NGC7635 (The bubble nebula) and NGC7538, nameless H-alpha gaseous matters has been distributed in outskirts. An open cluster of M52 is lying in upper left hand side of this image, you can appreciate only the cluster through binoculars.

To Close-up of NGC7635

Sh2-157 / Diffused Nebula, type 1 E
R.A.23h 15m 41.6s (2000.0)
Dec.+59° 55' 00" (2000.0)
Apparent Sizeabout 60'
Real Sizeabout 200 light yrs.
Magnitude -
Distance8150 light yrs.
Other IDsLBN537
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
NGC7538 / Diffused Nebula, type 1 E
R.A.23h 13m 42.0s (2000.0)
Dec.+6131' 09" (2000.0)
Apparent Size9.7×6.1'
Real Size4.2 light yrs.
Magnitude -
Distance9130 light yrs.
Other IDsSH2 -158, LBN 542


Around Sh2-163

Copyright(c) 2020 by Naoyuki Kurita, All rights reserved.
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