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…
<queqiao->
⟨syriantacobell⟩ Quick question relating to interplanetary transfers… what the heck is LAN?
<queqiao->
⟨blothorn⟩ It's the rotation of your ascending node relative to the celestial sphere (since its longitude relative to earth changes as the earth rotates).
<queqiao->
If you're using MJ to launch, just use the "Launch to LAN" feature.
<queqiao->
⟨syriantacobell⟩ Ok, I’ve been using launch into plane of target this whole time, thank you for saving my delta-v
<queqiao->
⟨blothorn⟩ Aye--as a general rule, it never makes sense to launch into the plane of something that isn't orbiting the same body as you are.
<queqiao->
⟨November (she/her)⟩ And LAN stands for longitude of ascending node
<queqiao->
⟨makoivis⟩ It’s where the ascending node crosses the equator
_whitelogger has joined #principia
<queqiao->
⟨blothorn⟩ Ascending nodes are points, they don’t cross anything. (The ascending node is where the orbital path crosses the equatorial plane heading North, however.)
<queqiao->
⟨moventosh⟩ i started playing with principia in stock and did a mun trajectory
<queqiao->
⟨moventosh⟩ and i didnt even get in the sphere of influence even though i was like 400 km away
<queqiao->
⟨moventosh⟩ is that normal
<queqiao->
⟨nazfib⟩ How do you know whether you are in the SoI? If you're waiting for the navball to change, that doesn't happen with Principia.
<queqiao->
⟨nazfib⟩ With Principia, SoI's only matter for science situations. As far as Principia is concerned, SoI's don't exist - you're always under the influence of the gravity of all bodies.
<queqiao->
⟨test_account9540⟩ SOI transitions are still noticeable, the altimeter starts showing a different number
<queqiao->
⟨test_account9540⟩ So if the altimeter is showing 400km rather than some high number you are in the Mun's SOI
<queqiao->
⟨moventosh⟩ i honestly dont remember where i got the number 400 km from
<queqiao->
⟨moventosh⟩ it mightve just been an estimate
<queqiao->
⟨moventosh⟩ ill have to mess around with it some more