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: 701 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 6 2006, 03:52 PM
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Well - consider the MER MI cover - that's an orange filter - so even if the cover's shut, you can still see something.
I'd imagine using something like lexan or other transparant materials for a thermal cover of an instrument has potential for a lot of problems with being britle, heavier, bad thermal properties, perhaps outgassing and contaminating optics etc etc.... And as Alan's said a few times, better is the enemy of good enough. Doug |
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