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Contains:  M 52, NGC 7654, Bubble nebula, NGC 7635, NGC 7538, NGC 7510
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Lobster Claw and Bubble Nebula HORGB

Technical card

Resolution: 4500x3322

Dates:Sept. 11, 2018Sept. 12, 2018

Astrodon 3nm OIII 31mm: 130x120" (gain: 75.00) -15C bin 1x1
Astrodon 5nm Ha 31mm: 130x120" (gain: 75.00) -15C bin 1x1
Astrodon BLUE 31mm - Gen2 E-Series Tru-Balance: 130x30" (gain: 75.00) -15C bin 1x1
Astrodon GREEN 31mm - Gen2 E-Series Tru-Balance: 130x30" (gain: 75.00) -15C bin 1x1
Astrodon RED 31mm - Gen2 E-Series Tru-Balance: 130x30" (gain: 75.00) -15C bin 1x1

Integration: 11.9 hours

Avg. Moon age: 2.49 days

Avg. Moon phase: 7.15%

Bortle Dark-Sky Scale: 8.00

Mean SQM: 17.90 job: 2270228

RA center: 23h 17' 57"

DEC center: +60° 55' 58"

Pixel scale: 2.040 arcsec/pixel

Orientation: 269.612 degrees

Field radius: 1.585

Locations: Home, Milwaukee, Wisconsin, United States

Data source: Backyard


A rare straight 7 days of near perfect weather, and I got called in for jury duty during most of it. That meant NO traveling out to my favorite darker sky site. Instead, I set up behind my home and let it run while I slept. I had never shot this region before and it was largely unobstructed for both nights, so it was ideal. To help gather some detail, I captured Ha and OIII in addition to the RGB. I'm not really the best at blending all this data, but the NBRGB script in Pixinsight really helped bring it all together.

Lots of stuff going on in this image, starting with Sh2-157 (Lobster Claw) on the left, with the small open cluster NGC 7510 below it. To the top center is the Bubble Nebula (NGC 7635), with open cluster M52 just above and to the left. Below that is a small red diffuse nebula Sh2-159 and emission and reflection nebula NGC 7538.



Chad Andrist
License: None (All rights reserved)

Sky plot

Sky plot


Lobster Claw and Bubble Nebula HORGB, 


            Chad Andrist