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

Click on image to enlarge

Date & Time: Aug 11 2024, from 22:10 to 24:45 JST(+0900)
Mosaic of 2 flames with 8min.×10shots
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -5°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


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, a dimmed Hα gaseous matters Sh2-161 etc have 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.
Magnitude-
Distance12400 light yrs.
Other IDsSH2 -162, LBN548
NGC7538 / Diffused Nebula, type 1 E
R.A.23h 13m 42.0s (2000.0)
Dec.+61°31' 09" (2000.0)
Apparent Size9.7×6.1'
Real Size4.2 light yrs.
Magnitude -
Distance9130 light yrs.
Other IDsSH2 -158, LBN 542



Sh2-155
Around Sh2-163

Copyright(c) 2024 by Naoyuki Kurita, All rights reserved.
To top page To Deepsky in Autumn index Cassiopeia