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Technical card

Imaging telescope or lens: RCOS 12.5" Truss

Imaging camera: SBIG STL6303e

Mount: Paramount ME

Guiding telescope or lens: RCOS 12.5" Truss

Guiding camera: SBIG ST-RGH

Software: Maxim DL

Filter: Astrodon Tru-Balance Generation 2

Accessories: PIROff-Axis Guider Homeyer

Resolution: 1800x1196

Dates: April 29, 2006

Frames: 42x600"

Integration: 7.0 hours

Avg. Moon age: 1.30 days

Avg. Moon phase: 1.90%

Astrometry.net job: 125983

RA center: 184.187 degrees

DEC center: 69.446 degrees

Pixel scale: 1.089 arcsec/pixel

Orientation: -179.520 degrees

Field radius: 0.327 degrees

Locations: Fort Davis, None; Asheville, None; North Carolina, None

Description

Constellation: Draco
Distance: 10 Million Light Years
Magnitude: 10.7

Commentary: NGC4236 is a barred spiral galaxy that is unusual in that it has no discernable core area at any wavelength. It is very faint and extremely large. It appears only as a ghostly streak of light visually due to its low surface brightness.

Date: 04-28,29-06
Location: Asheville, NC
Exposure: LRGB: 240-60-60-60 at -30c
Luminance unbinned, RGB bin 2
Processing: Processed using CCDSoft, CCDStack
Registar, Maxim, Photoshop CS

Optics: 12.5" RCOS Truss
Focal Length: 2808mm @ f9
Mount: Paramount ME
Camera: STL6303E
Focuser: RCOS
Guiding: OAG with guide camera
Filters: Tru-Balance LRGB 2"

Comments

Author

Tom Harrison
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NGC 4236, Tom Harrison