Comet Catalina (C/2013 US10) In Ursa Major
Taken by Bill Burnett on January 16, 2016 @
Hamilton, Montana USA
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable
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Details:
It has been mostly cloudy here in western Montana since early December. I finally was able to get a brief window of clear skies early this morning to capture an image of Comet Catalina as it is passing through Ursa Major - west of the handle of the Big Dipper. Seeing was marginal due to encroaching clouds ahead of a frontal system. The lower bright star is Alkaid at the end of the handle of the Big Dipper. The upper bright star is Mizar with its close companion, Alcor. In fact, in ancient times this double star was reputedly a vision test for a Roman soldier; if you could locate fainter Alcor, you were fit for the military!
The comet is now an easy target in binoculars. The inverted (negative image) shows both the dust tail and the much fainter ion tail of the comment better that the positive color image.
Details:
Camera: Sony A6000 DSLR
ASA: 6400
Lens: Canon 70-200 f/4 L Zoom set at 100mm
Number of Exposures: 3 x 100s
Processing: Images registered and stacked in Deep Sky Stacker with dark and bias frames subtracted.
Original Image size: 4000x6000 pixels (reduced for display here).
Photographer's website:
No URL provided.
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