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Hubble Space Telescope Pre-Perihelion ACS/WFC Imaging Polarimetry of Comet ISON (C/2012 S1) at 3.81 AU
Dean C. Hines, Gorden Videen, Evgenij Zubko +9
We present polarization images of Comet ISON (C/2012 S1) taken with the Hubble Space Telescope (HST) on UTC 2013 May 8 (rh = 3.81 AU, Delta = 4.34 AU), when the phase angle was alp…
Characterizing the Dust Coma of Comet C/2012 S1 (ISON) at 4.15 AU from the Sun
Jian-Yang Li, Michael S. P. Kelley, Matthew M. Knight +7
We report results from broadband visible images of comet C/2012 S1 (ISON) obtained with the Hubble Space Telescope Wide Field Camera 3 on 2013 April 10. C/ISON's coma brightness fo…
The Nucleus of Comet 10P/Tempel 2 in 2013 and Consequences Regarding Its Rotational State: Early Science from the Discovery Channel Telescope
David G. Schleicher, Matthew M. Knight, Stephen E. Levine
We present new lightcurve measurements of Comet 10P/Tempel 2 carried out with Lowell Observatory's Discovery Channel Telescope in early 2013 when the comet was at aphelion. These d…
Will Comet ISON (C/2012 S1) Survive Perihelion?
Matthew M. Knight, Kevin J. Walsh
On 2013 November 28 Comet ISON (C/2012 S1) will pass by the Sun with a perihelion distance of 2.7 solar radii. Understanding the possible outcomes for the comet's response to such…