The NGC3190 Galaxy Group
with 10" f/3.9 Astrograph
Uploaded 4/25/20
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This usually overlooked
galaxy group is 2 degrees north of Gamma Leonis, and consists
of four major objects, and hordes of faint background galaxies.
The central object is NGC3190, a peculiar edge on with a nice
dust lane at its equator. It is 12th magnitude and 3.6' long.
Just above is the stunning inclined spiral, NGC3185. At 13th
magnitude, it is only 2.2' in size, but shows clear spiral arms
here. Below and to the lower right of center is NGC3193. 11.8
magnitud and 2.4 minutes in size, this is an elliptical galaxy
with no internal detail. Finally, the beautuful but small barred
spiral to the left of center is NGC3187, a 14th magnitude gem
with stunning spiral arm extensions and a bluish coloration.
Two renditions
are shown. The first is a conventional image showing the interesting
hues of the stars and galaxies fully, The second image below
is a negative rendition, with all the field galaxies indicated.
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Negative
image, the faintest galaxies circled are 19th magnitude.
Select an image size for a larger view:
1600 x 1200
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Instrument: 10" f/3.9 Orion Astrograph Newtonian with Baader MPCC
Mount: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI Pro w/80mm piggyback refractor
Exposure: LRGB: 50:5:5:5
AstroDon RGB Combine Ratio: 1: 1.05: 1.2
Location: Payson, Arizona, Elevation: 5150 ft.
Sky: Seeing FWHM = 3 arcsec , Transparency 7/10
Outside Temperature: 55 F
CCD Temperature: -20 C
Image Processing Tools:
Maxim DL6: Calibration, deblooming (Starizona Debloomer), aligning, stacking
PixInsight: Curves, Deconvolution
Photoshop CS2: Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup
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