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Uploaded 29-Aug-11
Taken 29-Aug-11
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Dimensions1200 x 933
Original file size702 KB
Image typeJPEG
Color spacesRGB
Date modified29-Aug-11 12:22
Comet C/2009 P1 (Garradd)

Comet C/2009 P1 (Garradd)

Date/Time: August 26, 2011 11:24PM PDT

Location: Island Star Party, Bright Angel Park, Duncan, BC, Canada

This comet was well-placed in the evening sky, and this evening it was adjacent to M71, a small star cluster. The comet's dust tail is clearly visible, however the ion tail isn't apparent in this image. This wide field photo shows off all the stars and other celestial objects to be found in this part of the Milky Way.

Equipment: Hutech-modified Canon T2i dSLR utilizing an IDAS UIBAR-III filter mounted prime focus on a Borg 101ED f/4 Astrograph mounted on an unguided HEQ5.

Exposure: 26 x 1 minute at ISO 1600

Conditions: Temperature 16°C, Humidity 100% (dew). LVM 5.5, Transparency 4/5, Steadiness 5/5, clear skies

Processing:

ImagesPlus 4.25a x64 - Auto-process dSLR - Bayer at capture white balance; digital development from raw, dark frame calibration, normalize, grading, alignment, average min/max exclude combine. Aggressive contrast stretch (BP 2090, Bkgd 35); crop & save as 48 bit TIF.

ACDSee Pro 4: reduce colour depth to 24 bit, colour balance, HistogramTransformation (based on STF), save as TIFF.