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Tuesday, November 05, 2013

 

Comet C/2012 S1 ISON, 4 November 2013

Comet C/2012 S1 ISON captured on 4 November with iTelescope T4 at around 4:30 am local time in New Mexico, USA. The image is a stack of 10 x 60 second Luminance exposures. Images stacked then SUMMED using ImageJ, then contrast enhancement applied. click to embiggen. Animation made from all 10 images. Contrast enhanced to see the comet tail better. Image orientation: north is to the top, east to the left.

Finally got to get some more shots of C/2012 S1 ISON (and process a small part of my backlog). ISON is looking really impressive now in T4 (and not too shabby in T14).

I haven't been able to do anything sciencey, I suck at astrometrica, must be doing something wrong, but it can never identify the sar field and I just can't get an ISON magnitude out of it.

T4 is a  0.25-m f/3.4 astrograph, CCD SBIG ST-10XME 1.65 arc-secs/pixel

Below is comparisons of 11 October (the last decent image before the Moon got in the way) and last night. The comet is significantly brighter and a good tail developing.

Same image as aboveComet C/2012 S1 ISON captured on 11 October with iTelescope T4 at around 5:00 am local time in New Mexico, USA. The image is a stack of 7 x 60 second Luminance exposures. Images stacked then SUMMED using ImageJ, then contrast enhancement applied. click to embiggen

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