The Lobster Claw and Bubble Nebulas
Emission nebulas in Cepheus
Uploaded 8/21/25

 

            
One of the most beautifully
            structured nebula in the sky, the Lobster Claw nebula (Sh2-157/LBN540)
            in Cepheus has striking dark details across its entire face.
            Note the interesting "Linear" star cluster NGC7510
            on its right edge. Upper left is the Bubble Nebula which is enclosed
            in a large nebulous glow called Sh2-161. Top center is the small
            but extremely detailed NGC7538. Finally, two small but intruiging
            nebulous spots on the right side are IC1470 and Sh2-156.

            
Technical Data: 8"
            f/2 RASA astrograph, ASI2600mc + IDAS NBZ2

            Integration time = 2h total, Happy Jack, Az. 

            

            
Select an image size for a larger view:

1400 x 1200


Instrument:  RASA 8" f/2
Mount:  Home Made GEM
Camera:  Color CMOS ASI2600 MC
Guider: ASI mini  w/80mm piggyback refractor
Exposure:  120m ( 5 min subs)
Location:  Happy Jack, Arizona, Elevation:  7000 ft.
Sky:  Seeing FWHM = 2 arcsec , Transparency 9/10
Outside Temperature:  45 F

Image Processing Tools: 
Maxim DL6:  Calibration
PixInsight:  Alignment, Stacking, Star Removal
Photoshop CS2:  Curves, Color Correction, Cleanup

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