Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Bubble nebula, NGC 7635
Getting plate-solving status, please wait...
NGC-7635 Bubble Nebula in 4 channel narrowband, 


NGC-7635 Bubble Nebula in 4 channel narrowband

NGC-7635 Bubble Nebula in 4 channel narrowband

Technical card

Resolution: 8533x4802

Dates:July 18, 2016July 19, 2016July 20, 2016July 21, 2016

Astrodon 3nm Ha filter: 12x1800" -20C bin 1x1
Astrodon 3nm NII filter: 12x1800" -20C bin 1x1
Astrodon 3nm OIII filter: 10x1800" -20C bin 1x1
Astrodon 3nm SII filter: 10x1800" -20C bin 1x1

Integration: 22.0 hours

Darks: ~20

Flats: ~20

Flat darks: ~20

Bias: ~20

Avg. Moon age: 14.81 days

Avg. Moon phase: 98.57% job: 1169539

RA center: 350.163 degrees

DEC center: 61.182 degrees

Pixel scale: 0.198 arcsec/pixel

Orientation: -90.101 degrees

Field radius: 0.269 degrees

Locations: Fremont Peak Observatory (FPOA), San Jose, CA, United States


Image acquisition: Tom Bramwell
Image processing: Tom Masterson and Tom Bramwell

We really enjoyed working on this beautiful target. The Bubble Nebula was formed by stellar winds from a really hot star at its core, blowing all surrounding gas outward to form the bubble. This gorgeous emission nebula is located 8000 light years away, and can be found in the northern sky right next to Cassiopeia. It stays nice and high all night long this time of year - It currently rises for me around 9:30 pm and doesn't even cross the meridian until 4am. This enabled me to get a lot of exposure on it, over the course of just a few days. We had a clear spell here in San Jose, and I really tried to make the most of it. We hope you like it. Please feel free to share!

More can be learned about the Bubble here:

Acquisition Details:
OTA: Celestron C8 w/Starizona SCT Corrector
Imaging Camera: QSI 6120wsg-8
Guide Camera: Lodestar X2 (OAG)
Filters: Astrodon 3nm Ha/NII/SII/OIII, Hutech IDAS
Mount: Avalon Instruments M-Uno Fast Reverse

Taken 7/19-7/23 in the Silver Creek area of San Jose, CA with clear, still skies, under a full moon.

One channel per night. All frames shot at -20c; 20 ea flats, darks, bias

12 X 1800sec NII
10 X 1800sec OIII
10 X 1800sec SII
12 X 1800sec Ha (used as luminance)

R: 40% NII / 60% SII
G: 40% OIII / 30% NII / 30% SII
B: 100% OIII
LUM: 100% Ha



License: None (All rights reserved)

Sky plot

Sky plot


NGC-7635 Bubble Nebula in 4 channel narrowband,