Sharpless 224 near Capella - SNR
with NEXUS coma corrector
with 10" f/3.9 Astrograph @ f/2.9
Uploaded 3/13/24

 
This
            deep image of a rather peculiar SNR in Auriga near Capella has
            been called the "Rice Hat Nebula" for obvious reasons.
            It is terribly faint, one of the faintest of all the Sharpless
            nebula and requires extremely long integration times to see anything
            at all. The OIII reveals most of the bubble shape, with its expanding
            tendrils. The reds which are hydrogen show what appears to be
            a burst bubble that expanded far more rapidly on one side, thus
            creating the "hat". Age has been dated at about 80,000
            years. Tech Data: 10" f/2.8 GSO astrograph, Atik 16200 CCD,
            15 hours RGB, Ha, OIII. 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:  15h total
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:  35 F
CCD Temperature:  -30 C
Image Processing Tools: 
Maxim DL6:  Calibration, PixInsight:  All Remaining processing, Production finishing: Photoshop CS2

HOME   GALAXIES     EMISSION NEBS     REFLECTION NEBS   COMETS  
   GLOBULARS     OPEN CLUST     PLANETARIES     LINKS