Comet C/2012 S1 (ISON)
A comprehensive set of Hubble Space Telescope (HST) observations of Comet ISON
has been approved, with some early programs already executed.
|ID||Proposal Type||Science Instrument||PI||epoch|
|13197||DD||STIS||A'Hearn||2 May 2013|
|13198||DD||WFC3||Li||10 Apr 2013|
|13199||DD||ACS||Hines||7 May 2013|
|13229 ||DD||WFC3||Levay||30 April, 8 May 2013, 9 Oct 2013, more TBD|
On July 16, 2013 the STScI Office of Public Outreach released a blog (hubblesite.org/go/ison to gather inf
ormation about HST observations of Comet ISON together.
Hubble Heritage program 13229 imaged the comet on 8 May 2013, using a Wide Field
Camera 3 (WFC3) subarray which is half of one of the two CCDs (2K x 2K
subarray). Eight identical 171-second exposures were obtained, with one dither
step to mitigate bad pixels. The long-pass F350LP filter was used to maximize
the signal-to-noise in one orbit. A small offset from the nominal aperture was
applied to optimally position the comet and tail within the field of view.