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Comet C/2013 A1 Siding Spring Close Encounter with Mars

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#1 dcrowson


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Posted 20 October 2014 - 08:41 PM

On October 19th, 2014, Comet C/2013 A1 Siding Spring passed Mars at a distance of 132,000 km, roughly 1/3 of the distance between the Earth and the moon. While it was cloudy here on the 19th, the day before and after still gave us a chance to catch an image. This was a challenge because the image was taken between 15 and 10 degrees above the horizon.


Luminance – 12x75s – 15 minutes – binned 1x1

RGB – 3x75s – 3.75 minutes each – binned 2x2


18.75 minutes total exposure


Imaged October 18th, 2014 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm. This data was acquired by Dan Crowson (https://www.flickr.c...hotos/dcrowson/) and processing by Gregg Ruppel.


LRGB Composite - https://www.flickr.c...0729600/sizes/l





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#2 woolbrig


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Posted 21 October 2014 - 12:31 AM

Great shot!  That's really cool!

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Scopes: Celestron C9.25/Hyperstar, SkyWatcher 80ED Pro, WO Star-71 II Mounts: CGEM (Hypertuned), CG5  Guiding: Orion SSAG/ST80/Mini 50, OAG  Cameras: ASI120MC, ASI174MM, ASI224MC, Canon T3i (Baader Mod), QHY10, QHY23


#3 Neil



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Posted 21 October 2014 - 12:40 PM

Wow... that's a really nice shot, these are once in a life time images.


Excellent work Dan.


Will this be visible from our area of the world? Sounds like its was very low for you in the USA.


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