NGC6822 - Barnard's Galaxy in Sagittarius
with 10" f/3.9 Astrograph
Uploaded 9/12/23
| Here
is a new image we would like to share with you this week, Barnard's
Galaxy or NGC6822 in Sagittarius. This deep exposure has G2V
calibrated color, and has a total exposure time of just over
7 hours. You can see here some of the brighter stars in the galaxy
are starting to be resolved, with a more ruddy core and blue
outlying members. To the lower left side we can see a circular
blue cloud of stars which is an extremely difficult feature to
capture well. The HII regions are the red/pink areas all over
the periphery of this galaxy which is in the same structural
class as the SMC. Look closely at the HII regions and you can
see at least two or three ring shaped structures with dark centers
filled with small stars. Finally, there seemed to be a bit of
galactic cirrus in this part of the sky, but it was recorded
faintly. This is one of the few galaxies that is large enough
to shoot with my 10 inch and not appear as a tiny fuzzy spot.
Technical Details: 10" f/3.9 GSO astrograph, Atik 16200
CCD, 7.1 hours total integration time RGB, from Payson Arizona. |
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: 7 hours RRGB
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: 60 F
CCD Temperature: -30 C
Image Processing Tools:
Maxim DL6: Calibration, PixInsight: All Remaining processing, Photoshop CS2: Production finishing
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