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Comet ISON


Comet ISON C/2012 S1

RA = 11h 18m 48s, Dec = +5 deg 31 min 30 sec

Date & Site:

Imaged on 11/02/13; Little Blair Valley, Anza Borrego, CA

Imaged from 4:15 to 5:45 am DST


Telescope: TEC 140mm Refractor (f/7 980 mmfl)

Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10 with Astrodon filters;


Exposures: Six 5-minute exposures through RGB filters for a total of 90 minutes.

When this image was taken, ISON was approx 175 million km from earth coursing through the Constellation Leo

Estimated visual magnitude: 8.23.

Click Here to see an image of Comet ISON taken hours after it brightened from 8th to 6th magnitude from my backyard observatory

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