UmbralRaptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is 🐇. 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…
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RurouniDonut. — Hmm, so I'm much better at going to the Moon from a polar orbit then from an East West one
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RurouniDonut. — This East/West attempt is gonna take me 10 days to get there...
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lpg. — I've yet to quite wrap my head about what I should line up with what for east/west. Sometimes I get it right on first try, and I think I finally understand it, then i try again and not even close
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RurouniDonut. — Yeah
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RurouniDonut. — Idk how to line up the AN/DN of the orbit to face to the Moon or where it will be
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egg. — @lpg @RurouniDonut use the MCEA frame
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egg. — and launch into the reference plane of the navball (equivalently, minimize the out-of-plane velocity at the nodes *in that frame*)
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RurouniDonut. — Wdym by launch into it
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RurouniDonut. — Like wait until close to the gray line and start mechjeb or?
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egg. — yes, and make sure to set the MechJeb parameters in such a way that you end up staying on the gray line
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egg. — that's the plane of the moon's orbit
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egg. — so you should keep your velocity vector in there
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RurouniDonut. — Mmm
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RurouniDonut. — I tried that last launch but still took me 10 days to get their with just prograde velocity.
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RurouniDonut. — I tried that last launch but still took me 10 days to get there with just prograde velocity. (edited)
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RurouniDonut. — I was starting to move away from the grey line a lil before the launch
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RurouniDonut. — I’ll have to figure out how to get Mechjeb to stay within the gray line
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RurouniDonut. — Btw, should I plan manuevers in MCEA as the plotting frame or stick to ECI?
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egg. — to go to the moon, the plotting frame should be MCEA; the manoeuvre frame should possibly be ECI
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egg. — @RurouniDonut when you go to the moon, you care about where you are with respect to the moon (your pericynthion etc.), so you want a moon-centred frame
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egg. — and then you also want the beginning of the trajectory to be understandable, so you keep the direction of the Earth fixed so that the earth bit looks sane
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egg. — @RurouniDonut that way you get a figure-8 trajectory plot
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egg. — (that's old, so there was only EMB which is not ideal, also it's stock, but the principle is the same)
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lpg. — MCEA plotting, ECI manoeuvre is what I've been using, and it's worked well
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egg. — yeah it's reasonable
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egg. — ECI manoeuvre gives you an earth-orbit-appropriate sense of "forward" (and you want to burn forward in that sense), MCEA allows you to visualize a transfer orbit
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RurouniDonut. — Oh yeah, that's what I've been doing for the most part
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RurouniDonut. — Except I've been using MCI for the plotting frame
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RurouniDonut. — Time to figure though how to get Mechjeb to stay in the grey line
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egg. — yeah but MCI doesn't know about Earth
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egg. — so the beginning of your trajectory won't be very understandable
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lpg. — for me the main benefit of MCEA is actually seeing where the Earth will be at the _end_ of the trajectory - for antenna purposes
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egg. — antenna porpoises
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egg. — 📡🐬
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lpg. — the first narwhal hit for a "antenna porpoise" google image search is surprisingly low
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RurouniDonut. — I tried launching into MCEA and its not working out too well