egg changed the topic of #principia to: Logs: https://esper.irclog.whitequark.org/principia | <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…
raptop has quit [Quit: leaving]
<queqiao->
⟨Kalpyy⟩ does MJs rendezvous planner work w/ principia
<queqiao->
⟨Kalpyy⟩ * principia?
<queqiao->
⟨test_account⟩ I would be very surprised if it does
<queqiao->
⟨test_account⟩ Considering that reported periapsis, apoapsis and other orbital elements differ from reality with Principia, it's hard to see how it can do precise maneuvers
<queqiao->
⟨Kalpyy⟩ So I have to rendezvous manually then
<queqiao->
⟨test_account⟩ Yes, but it's quite easy using principia target reference frame
<queqiao->
⟨Kalpyy⟩ thank you, I didnt even think to look at the reference frames
<queqiao->
⟨test_account⟩ In this frame the target is immobile and you see your trajectory with reference to the target
<queqiao->
⟨test_account⟩ First you need to match orbital plane, then match orbits, then get close to the target, finally cancel the relative velocity to the target with a small burn.
<queqiao->
⟨Kalpyy⟩ ⟪test_account⟫ First you need to match orbital plane, […] ⮪ match orbits? I already launched into the same plane but much lower
<queqiao->
⟨test_account⟩ well, ideally you should match orbits and get close to the target in one maneuver, but that requires some planning when to start the maneuver
<queqiao->
⟨test_account⟩ the easy but slow way is match orbits, then make small burns to gradually get close to the target
<queqiao->
⟨Kalpyy⟩ when you say match orbits, do you mean to insert into the same orbit as the target?
<queqiao->
⟨test_account⟩ that, or increase your ap/pe so that the match the target
<queqiao->
⟨test_account⟩ * they match the target's orbit
<queqiao->
⟨test_account⟩ best if you can time this maneuver so that you will be close to the target after the maneuver
<queqiao->
⟨test_account⟩ but if not, the rendezvous is still possible but will take more time
<queqiao->
⟨Kalpyy⟩ Alright thanks 😄
<queqiao->
⟨test_account⟩ that, or increase your ap/pe so that they match the target's orbit (well, hopefully it's orbit is circular, if not things get more complicated)
<queqiao->
⟨Butcher⟩ Ideally your rendezvous orbit has the same inclination and LAN and one of perigee or apogee matching, then you just drift up neatly.
<queqiao->
⟨Butcher⟩ In reality you end up a bit off usually just just get close then cancel relative velocity.
<queqiao->
⟨Butcher⟩ * so
<queqiao->
⟨Kalpyy⟩ Rendezvous successful!
<queqiao->
⟨test_account⟩ that was fast
<queqiao->
⟨Kalpyy⟩ Well its not too difficult once you use the reference frame
<queqiao->
⟨lilHamster97⟩ Ladies, gentlemen and everyone in-between I have completed my first Moon mission in Principia
<queqiao->
⟨lilHamster97⟩ Unbelievably rewarding
<queqiao->
⟨lilHamster97⟩ ⟪test_account⟫ Mechjeb supposedly can execute […] ⮪ It has a button specifically for Principia manoeuvres but actually executing them is extremely hit-or-miss
<queqiao->
In my opinion, Principia manovs are much easier to pull off than stock.
<queqiao->
⟨Featherless Biped⟩ Ya I totally agree with that
<queqiao->
⟨Featherless Biped⟩ Being able to switch plotting frames at will makes sooo much difference, + the fact that your trajectory can be deflected whether or not you're in SOI
<queqiao->
⟨Featherless Biped⟩ Can't imagine going back to the stock system at this point