10:23 <queqiao-> ⟨Soviet Onion⟩ https://matrix.mockingbirdnest.com/_matrix/media/r0/download/matrix.mockingbirdnest.com/jXjRBuAOfoKJipNnKdLKuPoc/screenshot1.png

10:23 <queqiao-> ⟨Soviet Onion⟩ got into my first Lissajous orbit around L1 🥳

10:24 <queqiao-> ⟨Soviet Onion⟩ https://matrix.mockingbirdnest.com/_matrix/media/r0/download/matrix.mockingbirdnest.com/CZEJYCxtIthwCxQsWOsyuxxP/screenshot2.png

10:24 <queqiao-> ⟨Stonesmile⟩ Is that around SEL1?

10:28 <queqiao-> ⟨Soviet Onion⟩ Yeah

20:45 <queqiao-> ⟨nvv⟩ okay, so for rendezvous with another spacecraft LEO, I assume that I just need to get the orbit in the ECI ref frame to be right over the launch site?

20:45 <queqiao-> ⟨nvv⟩ * i nLEO,

20:45 <queqiao-> ⟨nvv⟩ * in LEO,

20:47 <queqiao-> ⟨Stonesmile⟩ MJ launch into plane of target is what most people use

20:51 <queqiao-> ⟨nvv⟩ I do that, but since I can't align the launch site with the plane perfectly, it gives me a countdown, and by that time, the spacecraft is too far ahead

20:52 <queqiao-> ⟨Stonesmile⟩ Phasing orbits, being lower than the target means you catch up, being higher means the target catches up to you

20:55 <queqiao-> ⟨nvv⟩ I tried something similar where I launched into a 390x390 orbit to catch up to a spacecraft in a 400x400 orbit, didn't work too well, but I'll try with a 395x395 orbit

20:56 <queqiao-> ⟨lpg⟩ to catch up (or let it catch up), you want _more_ difference between your orbit and the target, not lss

20:56 <queqiao-> ⟨Kirk (He/Him)⟩ That will make you catch up even slower

20:56 <queqiao-> ⟨Kirk (He/Him)⟩ I'd go to a 300x300 orbit

20:57 <queqiao-> ⟨egg⟩ ⟪Stonesmile⟫ Phasing orbits, being lower than the […] ⮪ Speaking of phasing orbits, https://user-images.githubusercontent.com/2284290/192368943-651c5295-3cf8-4f1b-970d-5ff3f570c903.png

21:10 <queqiao-> ⟨nvv⟩ ⟪Kirk (He/Him)⟫ I'd go to a 300x300 orbit ⮪ How much delta v would it take to get a close encounter after you caught up?

21:11 <queqiao-> ⟨Nazfib⟩ The worst-case scenario is when the target is just behind you when you reach orbit - you need to catch up a full orbit to it. At 390 km, this takes 462 orbits (29.5 days) . At 300 km, it takes only 45 orbits (2.8 days).

21:11 <queqiao-> ⟨Nazfib⟩ ⟪nvv⟫ How much delta v would it take to get a […] ⮪ Approximately 57 m/s in total, over two burns

21:12 <queqiao-> ⟨nvv⟩ Oh.. I thought it'd take more, I'll try that

21:23 <queqiao-> ⟨Butcher⟩ ⟪Nazfib⟫ The worst-case scenario is when the […] ⮪ Or you could just insert into a higher orbit and let it catch you.

21:23 <queqiao-> ⟨Nazfib⟩ Of course, that's also an option. In that case, divide the worst-case numbers by two.

21:23 <queqiao-> ⟨Butcher⟩ I like an elliptical orbit with the apogee the same as the target.

21:34 <queqiao-> ⟨leudaimon⟩ that's how rendezvous with the ISS works as well... it's pretty much the most flexible/efficient

21:37 <queqiao-> ⟨egg⟩ (that figure is from the very WIP noodle lexicon https://github.com/mockingbirdnest/Principia/wiki/Illustrated-Noodle-Lexicon#phasing, which is meant to convey an intuition of what familiar things—and perhaps also less familiar things—might look like in the appropriate frames in Principia)

21:37 <queqiao-> ⟨Butcher⟩ Easier to launch into too since you're not trying to get into a high perigee orbit right away.

21:38 <queqiao-> ⟨Al₂Me₆⟩ ⟪egg⟫ (that figure is from the very WIP […] ⮪ Curious how you're making these plots

21:38 <queqiao-> ⟨egg⟩ Mathematica that you really don’t want to see

21:42 <queqiao-> ⟨egg⟩ ⟪Butcher⟫ I like an elliptical orbit with the […] ⮪ (that’s the top row in the figure, the bottom row being a higher apogee and the same perigee, assuming a circular target)

21:43 <queqiao-> ⟨Butcher⟩ ⟪egg⟫ Mathematica that you really don’t want […] ⮪ Noodle code to draw noodles.

21:43 <queqiao-> ⟨egg⟩ indeed.

21:44 <queqiao-> ⟨Butcher⟩ Form follows function. 👌