Where is New Horizons now |
Where is New Horizons now |
Mar 29 2006, 02:58 PM
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#1
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Junior Member Group: Members Posts: 22 Joined: 2-March 06 Member No.: 691 |
i found this web site
http://www.heavens-above.com/solar-escape.asp it show where NH is compared to voy1, 2/pioneer any one else have a fav web page that shows NH loc? I think this one is updated onece a day |
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Apr 1 2008, 06:12 AM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
"...These planet orbit crossings are based on whatever day we pass the distance of the planet, so although we are currently beyond Saturn's semi-major axis, Saturn is near its aphelion and we don't count the orbit crossing until we are further out than Saturn itself is..."
I've thought that there's a pedantically-over-precise :-) way of saying when something's outside whatever's orbit, especially for something leaving the solar system outside the vicinity of the ecliptic (like the Voyagers). Each planet's orbit is an ellipse, with the semi-major axis going through the sun. Imagine rotating the planet's orbit on the semimajor axis, to form an elliptcal sphereoid "membrane" with the sun at one focal point. A spacecraft or whatever is beyond the planet's orbit when it punches through that membrane. (let's hope it doesn't deflate it!) |
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Apr 8 2008, 09:51 PM
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#3
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Member Group: Members Posts: 532 Joined: 19-February 05 Member No.: 173 |
All-- Today we are 810 days from launch and 405 days from Jupiter C/A. That is, we have spent precisely as many days post-Jupiter as it took to get there.
And at the very end of May we will be 25% of the way to the Pluto system in days—so we are about to enter the long middle of the journey that will last until early 2013. There are still 2652 days to go. Vigilance is our watchword. -Alan |
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