Mercury Flyby 2 |
Mercury Flyby 2 |
Feb 8 2008, 10:50 PM
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#1
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
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Sep 8 2008, 11:45 PM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I have from a very reliable source the current best estimate (as of Friday, September 5) of flyby time being 08:40:21.4 UTC. At that time it'll be 200.2 km from Mercury.
My source has different orbital information -- is yours measured with respect to the ecliptic? I could also select "with respect to Earth mean equator" or "with respect to Mercury equator". These are with respect to the ecliptic: Semimajor axis: 7,596,000 before / 6,975,000 after Periapsis radius: 4,720,000 before / 4,523,000 after Eccentricity: 0.38 before / 0.35 after Inclination: 6.9 before / 7.0 after -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Sep 9 2008, 12:14 AM
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#3
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Member Group: Members Posts: 340 Joined: 11-April 08 From: Sydney, Australia Member No.: 4093 |
My source has different orbital information -- is yours measured with respect to the ecliptic? Mine are the orbital information for Messenger's orbit around the Sun ... the Solar System Barycenter to be precise ... so maybe that is where the difference comes from. Thanks for the current best estimate. Will work it into the model shortly. Mmmm if your reliable source changes its figures, please post it here :-) -------------------- |
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