Sunday, November 10, 2013
Comet C/2013 S1 ISON, from Mars to Virgo (20 October-9 November 2013)
|20 October, Comet ISON near Mars (Mars is the really bright thing up the top)||26 October, Comet ISON in the galaxies||9 November, comet ISON passing by the Virgin|
While comet C/2013 S1 ISON has not been brightening as much as hoped, it is still brightening. This series of images was shot between 20 October and 9 November using iTelescope T14 (a 0.10-m f/5.0 astrograph with SBIG STL-11000M and 3.5 arc-secs/pixel). Unfortunately the weather was not kind, so I don't have a longer sequence.
As well, moonlight, light haze and encroaching twilight have affected the images, but even so you can see the substantial increase in in tail length and brightness over 3 weeks. Despite claims that ISON is just about to disintegrate (or has already disintegrated, or is a spaceship), it is developing nicely.
All images are stacks of 60 second luminance exposures, between 8 and 5 depending on the conditions. If you click on the images (warning, they are quite big), you will get a lot more detail, especially the middle panel where there are lots of galaxies, you will get much better detail.
I've got quite a few from T4 and T5, with higher resolution, I will have to process them soon.