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Contains:  Bubble nebula, M 52, NGC 7538, NGC 7635, NGC 7654, The star 4Cas
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Bubble Nebula Region in Ha, 


Bubble Nebula Region in Ha
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Bubble Nebula Region in Ha

Technical card

Dates:Nov. 16, 2019Dec. 5, 2019

Frames:Optolong L-eNhance 2": 37x360" ISO400

Integration: 3.7 hours

Darks: ~25

Flats: ~15

Bias: ~25

Avg. Moon age: 13.54 days

Avg. Moon phase: 72.70%

Basic astrometry details job: 3106665

RA center: 23h 20' 48"

DEC center: +61° 2' 13"

Pixel scale: 2.083 arcsec/pixel

Orientation: 96.143 degrees

Field radius: 1.964 degrees

Resolution: 5659x3750

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard


Imaged the region around the Bubble Nebula (Sh2-162) that includes the cluster M52 and the Lobster Claw (Sh2-157, barely visible at the top, right edge of the frame) on the nights of November 16 & December 5, 2019. This image is generated from narrow-band Ha data. The bubble near the center of Sh2-162 is a bit more visible and the Lobster Claw stands out much better here than in the image generated from RGB data. Going to generate some bicolor and NBRGB versions that should be an improvement over the original RGB version.

Imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong L-Enhance dual narrowband filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Extracted red/green/blue channels using BatchChannelExtraction script. R and G+B channels registered and stacked using StarAlighment and Integration. Total integration time of ~3.5 hours using 37 subs at ISO400x360 sec. R and G+B channels individually post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using masked stretch, Curves Transformation, TGVDenoise for noise reduction, Local histogram transform, morphological transform to shrink stars.



License: None (All rights reserved)

Sky plot

Sky plot


Bubble Nebula Region in Ha,