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 7 2006, 03:51 PM
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
The very easiest way for this is if someone can get it into celestia, and we can just run thru the flyby looking for interesting moment
You've opened a big bad can of worms here John Downlink was 2048kbps from Jupiter wasnt it I'm sure you'll have lots of loonie ideas - but a moon rising or setting from behind Jupiter with possible refraction thru the upper atmosphere could be interesting.... Not sure of exact timing (see attached) if I have the night-side-day-side right, this would see a crecent Io set behind the dark-limb of Jupiter, so it would be squished and squashed as it set, in a way a little similar to this... http://spaceflight.nasa.gov/gallery/images.../s103e5037.html but without a bright limb of Jupiter to get 'in the way' Some upper atmosphere refraction has been seen by Cassini... http://ciclops.org/media/dr/2005/1114_2631_2.png http://ciclops.org/media/dr/2005/1191_2857_2.png http://ciclops.org/media/dr/2005/1017_2487_1.jpg Perhaps something to be learnt about the properties and extent of the upper jovian atmosphere by catching this little event? I think that the classic Cassini 'mutual' events of transits etc are likely to be uncommon at a range worth imaging (guessing here). Another potential target that's perhaps half scientific, half Kodak - is a lit side of a moon, being partially occulted by the jovian ring system- not sure how it might look or if it would appear at all, but again, potential for something 'interesting' if not beautiful Doug
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