Deep Sky Object in Autumn
NGC7635 (Bubble Nebula in Cassiopeia)

Click on image to enlarge

Date & Time: Sep 30 2022, from 24:40 to 25:54 JST(+0900)
Composed 10 shots with 8 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with IDAS LPS-P1 Light-pollution suppression filter
Auto-guided with Meade LX200 Equatorial & Lacerta M-GEN
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


NGC7635 / Diffused Nebula, type 1 E
R.A.23h 20m 40.0s (2000.0)
Dec.+61° 12' 00" (2000.0)
Apparent Size16.0×6.0'
Real Size20 light yrs.
Magnitude -
Distance12400 light yrs.
Other IDsSH2 -162, LBN 548
A reddish diffused nebula with a span of 16 arc minutes is NGC7635, positioned about 30 arc minutes southwest from an open cluster of M52 near a border to Cepheus. The nebula itself is not so larger one but photogenic and has a striking feature of clear 3'-sized round shape in center. This shape gives a nickname of "Bubble Nebula". It's considered that a supernova explosion in the nebula has formed the characteristic structure.

Jump to Wide field image includes M52, NGC7635 & Sh2-157



Nebulosities around Cassiopeia & Cepheus
Blue Snowball(NGC7662)

Copyright(c) 2022 by Naoyuki Kurita, All rights reserved.
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