NH at Jupiter, Planning the Jupiter encounter |
NH at Jupiter, Planning the Jupiter encounter |
Jan 22 2006, 10:57 PM
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Member Group: Members Posts: 706 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
I think the Jupiter encounter deserves its own thread.
I've just been taking a first look at the Jupiter encounter geometry. You can do the same using Mark Showalter's excellent on-line ephemeris tools at the PDS rings node, which by good fortune happens to include a New Horizons ephemeris (calculated over a year ago) for our actual launch date, January 19th. We'll have an updated ephemeris soon, but this one's already good enough for planning. As Roby72 noted in the Star 48 thread, the satellites are (annoyingly) all on the opposite side of Jupiter at closest approach. We'll still get good views of all sides of Io because Io rotates in only 1.8 days and we'll be pretty close to Jupiter for that long. We'll get fairly good coverage on Europa too, for the same reason. But we won't get very close to Ganymede or Callisto. Luckily Io is our highest priority satellite target and Europa is next, so we'll do OK. |
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Feb 14 2006, 05:56 PM
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Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
John,
How quickly can LORRI cycle between pictures? Also, do you expect you'll be able to capture Jupiter's faint rings? What about if a moon is in the same FoV? -------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Feb 14 2006, 06:38 PM
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Director of Galilean Photography Group: Members Posts: 896 Joined: 15-July 04 From: Austin, TX Member No.: 93 |
John, How quickly can LORRI cycle between pictures? Also, do you expect you'll be able to capture Jupiter's faint rings? What about if a moon is in the same FoV? Here's an ani gif of the IO + RINGS + JUPITER encounter. I didn't notice before, but it looks like Metis is also visible, but I don't think it will be more than a pixel or two. The pictures are taken 5 minutes apart. BTW, since Io passes behind Jupiter's dark side, it should be illuminated well by the Jupiter-shine. -------------------- Space Enthusiast Richard Hendricks
-- "The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible." --Rescue Party, Arthur C Clarke Mother Nature is the final inspector of all quality. |
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Feb 14 2006, 07:19 PM
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#4
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Member Group: Members Posts: 706 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Here's an ani gif of the IO + RINGS + JUPITER encounter. I didn't notice before, but it looks like Metis is also visible, but I don't think it will be more than a pixel or two. The pictures are taken 5 minutes apart. Pretty cool animation- we can certainly take pictures fast enough to make a movie like that, though the rings are probably much fainter than the illuminated crescent of Io so I'm not sure if we can get a good exposure on both Io and the rings at the same time. This is one that we'll consider if there turns out to be room in the timeline. |
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