Hemisphere:  Northern  ·  Contains:  Bubble Nebula  ·  Bubble nebula  ·  NGC 7635  ·  NGC7635  ·  Sh2-162
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NGC 7635 - Bubble Nebula, 


            Paul Ricker
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NGC 7635 - Bubble Nebula

Imaging telescopes or lenses: Astro-Tech AT8RC

Imaging cameras: ZWO ASI183MM-Pro

Mounts: iOptron iEQ45 Pro

Guiding telescopes or lenses: Astro-Tech AT8RC

Guiding cameras: QHYCCD QHY5-III 178M

Focal reducers: Astro Physics CCDT67

Software: PhD2  ·  StarTools  ·  Deep Sky Stacker (DSS)  ·  Photoshop CC  ·  Astro Photography Tool - APT Astro Photography Tool

Filters: Asronomik Ha CCD filter 6nm  ·  ZWO new B  ·  ZWO new G  ·  ZWO new R

Accessory: ZWO EAF  ·  ZWO EFW Mini  ·  Teleskop Service TSFLIP Flip Mirror and Off Axis Guiding System

Dates:Oct. 22, 2020Oct. 30, 2020

Asronomik Ha CCD filter 6nm: 16x900" (gain: 100.00) -5C bin 2x2
ZWO new B: 8x300" (gain: 100.00) -5C bin 2x2
ZWO new G: 8x300" (gain: 100.00) -5C bin 2x2
ZWO new R: 8x300" (gain: 100.00) -5C bin 2x2

Integration: 6.0 hours

Darks: ~30

Flats: ~24

Flat darks: ~25

Avg. Moon age: 10.04 days

Avg. Moon phase: 68.85%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 3972135

RA center: 23h 20' 42"

DEC center: +61° 11' 34"

Pixel scale: 0.941 arcsec/pixel

Orientation: -87.368 degrees

Field radius: 0.394 degrees

Resolution: 2527x1649

Locations: Backyard, Champaign, IL, United States

Data source: Backyard


NGC 7635, the Bubble Nebula. A bubble 10-15 pc across blown by the wind of the star SAO 20575. The surrounding nebulosity is a molecular cloud (presumably the one SAO 20575 formed from) that is being dissociated and ionized by the star's UV light.

This is my first try at HaRGB.



Paul Ricker
License: None (All rights reserved)

Sky plot

Sky plot


NGC 7635 - Bubble Nebula, 


            Paul Ricker