Sharpless 2-308, The Dolphin Head Nebula in Canis Major
with 10" f/3.9 Astrograph @ f/2.8
Uploaded 4/24/24

 

            
This is a deep shot
            of Sharpless 2-308 in Canis Major with our 10 inch taken in April
            this year. Youve probably seen many shots of this object recently,
            but few if any record the extensive background nebulosity colored
            both red from Halpha and blue/green from OIII. The goal here
            then was to portray the dolphin in a subtle teal color in front
            of a rich rippling wavy background of multi colored nebulosity.
            If you are shooting the Dolphin, go long to capture this background,
            otherwise you may be missing out on an incredibly beautiful scene!

            
Technical Data: 10"
            GSO @ f/2.8, Atik 16200 CCD, 3h 45m, Payson Az.

            
Select an image size for a larger view:

1400 x 1290


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Nexus 0.75x CC
Mount:  Astrophysics 1200 QMD
CCD Camera:  ATIK 16200 
Guider: ASI290  w/80mm WO Zenithstar 81 piggyback refractor
Exposure:  3h 45m Ha-OIII-RGB
Astronomik  RGB Combine Ratio:  1: .9: 1.6 = G2V  calibrated
Location:  Payson, Arizona, Elevation:  5150 ft.
Sky:  Seeing FWHM = 3 arcsec , Transparency 9/10
Outside Temperature:  45 F
CCD Temperature:  -30 C
Image Processing Tools: 
Maxim DL6:  Calibration, PixInsight:  All Remaining processing, Production finishing: Photoshop CS2

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