Leo II - Dwarf spheriodal in Leo
with 10" f/3.9 Astrograph
Uploaded 5/15/25

 

            
The dwarf spheriodal
            galalxy Leo II in Leo is very seldom imaged by amateurs. However,
            as you can see it is clearly resolvable into a glowing sparkle
            of both golden and saphire blue super giant stars. A background
            of unresolved blue stars is in its core. This very much resembles
            a globular cluster such as Omega Centauri, which is a small galaxy
            core stripped of its outer stars. Stars to 20th magnitude are
            seen here, the brightest members are around magnitude 17 or so.

            
Technical Data: 10"
            f/3.9 Newtonian astrograph, Atik 16200 CCD - 50% crop, LRGB =
            4 hours total, Payson, Az.

            
Select an image size for a larger view:

1600 x 1290


Instrument:  10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount:  Astrophysics 1200 QMD
CCD Camera:  ATIK 16200 
Guider: ASI290  w/80mm WO Zenithstar 81 piggyback refractor
Exposure:  4 hours LRGB
Astronomik  RGB Combine Ratio:  1: 1.05: 1.5
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, Photoshop CS2: Production finishing 

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