NGC 7635 (Sh2-162) aka "The Bubble" Bright Nebula in Cassiopeia

Located at: RA 23 hours 20 minutes 40 seconds, Dec +61 degrees 12 minutes 00 seconds

Size: 16' x 6.0' Magnitude: -- Class: HII (ionized) region (Sharpless) 3 3 3

North is up

West to the right


14.5" f5 Newtonian reflector


 ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56


 Lumicon Red filter, 930 minutes (93 x 10 minute subs), 09/29/30 & 10/1/3/2013, FWHM 3.3-4.1 per CCDStack


CCDStack 2.75.4973.15338, Photoshop CS5.1


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)


Another complex area of the sky containing a bevy of deep sky objects. Also imaged in this area is M 52, NGC 7538 and NGC 7510. See the 8" version of NGC 7635.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 7635

NGC 7635 = Bubble Nebula = Hb 11 = LBN 548 = Sh 2-162
23 20 45 +61 12.7
V = ~10.5;  Size 15x8

17.5": the "Bubble Nebula" extends mainly north [center 5.5' NE] of the involved 
illuminating mag 8.4 star SAO 20575.  There are suspected dark lanes to the 
north with very faint nebulosity just north of this gap.  The main piece curves 
away from the involved star towards the east but appears brightest at the 
western edge near the bright star.  Only a portion of the rim of the "Bubble" 
was viewed.  The view improved with OIII and UHC filters but not dramatically.  
M52 lies 35' NE.

13" (9/29/84): unusual appearance - surrounds a mag 8 star with a mag 7 star 
nearby to the SW. The nebulosity mostly appears north of the mag 8 star with a 
suspected dark lane to the north of this nebulosity. Very faint nebulosity 
appears close north of this lane. The main section hooks around the involved 
star to the east.

- by Steve Gottlieb