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BepiColombo Launch & Cruise Phase
brellis
post Oct 2 2021, 07:03 PM
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Astounding how precisely successful this maneuver appears! Question: how close did the actual flyby match the calculations in terms of effect on the spacecraft's speed and course? Or was there a ballpark/range predicted based on how precisely we know Mercury's mass and orbit?
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Phil Stooke
post Oct 2 2021, 07:19 PM
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JRehling: "At global resolution, Messenger has given us a complete map of Mercury that leaves little to improve upon. However, BepiColombo will nonetheless perform a great deal of original science"

Messenger certainly gave excellent results, but there is much that can be improved on. Messenger had an orbit which gave low passes over the north pole and high passes over the south, so imaging and all datasets were better in the north than in the south. As an example, the laser altimeter was unable to collect data over much of the southern hemisphere, so the global topo map is less accurate in the south where only stereoscopic imaging is available (stereo gives great detail but it needs altimetry to determine the location in space of the stereo model). BepiColombo will improve on many of Messenger;s datasets in the south. And the high resolution imager will greatly extend the limited high resolution mapping by Messenger.

Phil


--------------------
... because the Solar System ain't gonna map itself.
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bobik
post Oct 3 2021, 06:28 AM
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JAXA's flyby webcast and ESA Operations tweets reminded me how cool it would have been if we had got, among others, real-time temperature readings through ESA's BepiColombo Quick-Look Analysis web interface during the flyby, but alas! rolleyes.gif
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TrappistPlanets
post Oct 3 2021, 06:14 PM
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QUOTE (Phil Stooke @ Oct 2 2021, 07:19 PM) *
JRehling: "At global resolution, Messenger has given us a complete map of Mercury that leaves little to improve upon. However, BepiColombo will nonetheless perform a great deal of original science"

Messenger certainly gave excellent results, but there is much that can be improved on. Messenger had an orbit which gave low passes over the north pole and high passes over the south, so imaging and all datasets were better in the north than in the south. As an example, the laser altimeter was unable to collect data over much of the southern hemisphere, so the global topo map is less accurate in the south where only stereoscopic imaging is available (stereo gives great detail but it needs altimetry to determine the location in space of the stereo model). BepiColombo will improve on many of Messenger;s datasets in the south. And the high resolution imager will greatly extend the limited high resolution mapping by Messenger.

Phil


did any of the images from the flyby image the south at all?
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JRehling
post Oct 3 2021, 10:55 PM
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QUOTE (TrappistPlanets @ Oct 3 2021, 11:14 AM) *
did any of the images from the flyby image the south at all?


Not better than this:
https://astrogeology.usgs.gov/search/map/Me...aic_Global_166m
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Explorer1
post Oct 4 2021, 03:54 PM
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Video including some more distant departure views (overexposed, but still neat!)
https://www.youtube.com/watch?v=GdOLeGeqAEI
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