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Comet C/2012 S1 (ISON) - Update 2012, Oct. 4

5 Oct 2012, 09:09 UTC
Comet C/2012 S1 (ISON) - Update 2012, Oct. 4
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We obtained further follow-up on C/2012 S1 (ISON) on 2012, Oct. 4.6, again through the 2.0-m f/10.0 Ritchey-Chretien + CCD + Bessel R filter of Faulkes Telescope North (F65) Haleakala.Stacking of 9 exposures, 120 seconds each, produced an image where a well developed and elongated coma measuring nearly 6"x9" is now visible, extended toward PA 280 deg. Click on the image below for a bigger version. From this stacking, the Afrho parameter was determined to be about 1530 +/- 150 cm (see panel below). The total magnitude has been measured as R= 17.7. Click on the image below for a bigger version. For more info about comet C/2012 S1 (ISON) please see our previous post: http://remanzacco.blogspot.it/2012/09/new-comet-c2012-s1-ison.html http://remanzacco.blogspot.it/2012/10/updated-data-for-comet-c2012-s1-ison.html by Nick Howes, Giovanni Sostero and Ernesto Guido

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