Charon Surface Observations: NH Post-Encounter Phase, 1 Aug 2015- TBD |
Charon Surface Observations: NH Post-Encounter Phase, 1 Aug 2015- TBD |
Aug 1 2015, 06:02 PM
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
This topic is for images and discussion of same received after 1 Aug 2015.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Aug 2 2015, 07:49 AM
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Junior Member Group: Members Posts: 82 Joined: 13-July 15 Member No.: 7579 |
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Aug 2 2015, 02:50 PM
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
the Sun is behind the Charon's disc What makes you say that? The size of Charon in that post-encounter frame is roughly similar to its size in this frame: http://pluto.jhuapl.edu/soc/Pluto-Encounte...0x632_sci_1.jpg That pre-encounter frame was taken more than a day before closest approach, so the post-encounter frame had to be taken roughly a day after closest approach. But the Charon-sun occultation occured only 2h 15m after closest approach. So the sun must be outside the frame on that Charon crescent image. |
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Aug 2 2015, 03:56 PM
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Member Group: Members Posts: 244 Joined: 2-March 15 Member No.: 7408 |
The picture fredk linked was taken from a range of 1,462,006 km, according to the metadata file.
The crescent image was taken from a range of 1,986,740 km, according to the metadata file, and since apparent diameter has a simple, inverse relationship with distance, Charon should be about 73.6% the size it was in the image fredk linked. Not that that adds anything to the conversation |
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