raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Fréchet. We currently target 1.5.1, 1.6.1, and 1.7.x. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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[Principia] scimas commented on issue #2443: Vessels "forget" prediction settings upon landing - https://git.io/JvJw6
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[Principia] pleroy closed pull request #2437: Change the ReadFromMessage method of the adaptive-step size integrators to be static - https://git.io/Jvfcc
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[Principia] pleroy pushed 8 commits to master [+0/-0/±25] https://git.io/JvJig
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[Principia] pleroy f138adf - A new serialization test.
<discord->
Myshiko. — @Falcon it’s much higher inclinations that noticeably benefit from the day of the month selection
<discord->
Falcon. — just need the skill to do so
<discord->
Butcher. — Depends on your launch site too.
<discord->
Myshiko. — At 26 just push time of day to minimize the distance between the launch site and moon plane and then muscle your way through. You will correct the inclination on the departure to the moon burn
<discord->
Falcon. — so launch slightly south and dog leg then?
<discord->
Myshiko. — For large inclinations, you have to do a bit of mental math - mentality draw the orbital plane passing through the launch site, like for Baykonur that would be 53 or so inclination
<discord->
Myshiko. — Check where that plane intersects the orbit of moon
<discord->
Myshiko. — You’ve got 2 points
<discord->
Myshiko. — Now, your craft needs to arrive to one of those two points at the same time as moon
<discord->
Myshiko. — The flight time to the moon is 3 days
<discord->
Falcon. — you mean figure out when you cross the equator and make the an/dn when you need to burn?
<discord->
Myshiko. — 1/4 of moon orbit is 29/4 = 8.25 days
<discord->
Myshiko. — So, moon needs to be offset from that ideal point by about 1/8th of its orbit
<discord->
Myshiko. — You need to figure out Moon position at launch
<discord->
Myshiko. — So that you mostly burn prograde
<discord->
Myshiko. — So, moon needs to be offset from that intersection point by about 1/8th of its orbit (edited)
<discord->
Falcon. — i would need a video to show me this....
<discord->
Falcon. — lol
<discord->
Myshiko. — You are trowing a stone and trying to hit a moving Burt
<discord->
neph. — Burt
<discord->
Myshiko. — You are trowing a stone and trying to hit a moving bird (edited)
<discord->
Myshiko. — You are throwing a stone and trying to hit a moving bird (edited)
<discord->
Myshiko. — I hate iPhone 🙂
<discord->
Myshiko. — Ye, some day I’ll make a video
<discord->
Myshiko. — But in a few words, for Baykonur the moon needs to be on the directly opposite size plus about 1/16 of its orbit. Then the intersection point will be at “opposite side plus 1/8)
<discord->
Myshiko. — So, moon needs to be offset from that intersection point by about 1/16th of its orbit (edited)
<discord->
Myshiko. — So, moon needs to be offset from that intersection point by about 1/8th of its orbit (edited)
<discord->
Myshiko. — More or less, just inclined like hell 🙂
<discord->
Myshiko. — The exact perfection is not needed, since corrections are not that expensive as long as you’ve got the “order of magnitude” day right
<discord->
Myshiko. — And again, for 26 inclination it’s very hard to get a good feel for it, since inclination change is not that huge. But with very large inclinations it mentally clicks very well 🙂 - aim for the intersection of orbital plane passing thought the launch site and moon orbit. Keep in mind the speed of moon (29 days full rotation or so), so that Moon arrives at that point.
<discord->
Myshiko. — Since all objects are I free fall, it’s exactly same mental task as throwing stones. And I am sure you practiced stone throwing as kid - just remember that feeling.
<discord->
Myshiko. — Turn off the guidance computer and use The Force 🙂
<discord->
neph. — Love that analogy
<discord->
Myshiko. — Since all objects are in free fall, it’s exactly same mental task as throwing stones. And I am sure you practiced stone throwing as kid - just remember that feeling. (edited)
<discord->
neph. — I would love to be a stone-throwing starchild trying to hit moons in orbit
<discord->
Myshiko. — Well, at least a close flyby would be good 🙂
<discord->
Myshiko. — But in a few words, for Baykonur the moon needs to be on the directly opposite side plus about 1/16 of its orbit. Then the intersection point will be at “opposite side plus 1/8) (edited)
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[Principia] eggrobin synchronize pull request #2438: Symmetric bilinear forms on bivectors and the anticommutator form - https://git.io/Jvf6p