Toggle Periapsis?

[Svillefan08]

I'm on a transfer orbit to the mun, and I've entered the mun's sphere of influence, but I have no idea where my periapsis is going to be in order to burn at it. It isn't displayed on my current path, and I deleted the old node I burned to get into my transfer orbit because there were too many colors and it was confusing. Is there any way to toggle periapsis on / off?

[Un]

Burn retrograde so your orbit is circular then you will see your apoapsis and periapsis.

No, you can't toggle periapsis on and off.

[SamsAPigeon]

this is an occasional bug wit ksp that all of the trajectory lines vanish, just go to the space centre and back into your flight and it should have all come back

[Red Comet]

What does your orbit look like? Are you on a collision course with the mun? If so, you'll have to widen your orbit to find your Periapsis, because if you're on a collision course, your periapsis is the surface of the mun...

If that's not the case, burning retrograde should give you a stable orbit eventually. If you use a maneuver, that will help you visualize what's happening and how long you need to burn to get where you want to be.

[Svillefan08]

Here is my orbit:

http://steamcommunity.com/profiles/76561198007105306/screenshots/?appid=220200

It sounds like it the periapsis just won't show in a hyperbolic orbit like this. It shows when I made the node to get into this orbit, but disappeared when I deleted the node.

[Maverick]

OP - use Copy Link Address when posting pics. It leaves us in the forum when we want to view it.
http://steamcommunity.com/sharedfiles/filedetails/?id=169307043

It's common to switch SOI and have no Pe. (FYI: It happens a lot with Mechjeb)

You should only need to start burning retrograde as soon as the SOI switches to Mun and Pe should "pop back out" off the surface. Once it does, burn retro to desired altitude and then set node to circularize.

EDIT: You also noticed Pe "reappeared" using a node. That's the Pe that *you will get* if you burn as per the node, not the Pe you currently have (or not for that matter...yikes).

[A Fat, Angry Serval]

It looked like that trajectory was going to impact. You need to perform a correction burn to bring your Periapsis up.

[bpivk]

Originally posted by {RLT} VestedGamr:

It looked like that trajectory was going to impact. You need to perform a correction burn to bring your Periapsis up.

Hmm from the picture posted it doesn't look like an impact. He has quite a way to go to reach surface. It's just a bug.

@OP: PE sometimes bugs out due to mods. I don't remember happening on a stock game but if it ever happens again either go to spaceport and back (that usually fixes things) or just burn at the lowest point (at the hump in your picture). But always zoom in so that you can see if your PE is not in the actual object and if so do a correction burn as {RLT} VestedGamr said.

[Maverick]

Originally posted by gxs:

Hmm from the picture posted it doesn't look like an impact. He has quite a way to go to reach surface. It's just a bug.

Not so sure. Saw exact same today coming back from Mun - flight looked 5 by 5 on trajectory but no Pe. I thought "hello?", "this is the same issue as was posted this morning. Odd coincidence..."

Rotated screen around for a better view, zoomed in and yes, impact imminent. Quick burn to fix.

[bothersome]

If you don't get a PE marker, it is an impact, or uh, will be... :)

[ChillestBro]

You won't see a Periapsis if you are on a collision course to an object, but there actually is a way to "toggle" the Periapsis OR Apoapsis by left clicking on the tab icon for either. This can be difficult as you can click the path instead very easily, causing a manuever node to pop up. This will make flying in map mode easier as you can just click the periapsis to see what your manuevers are doing in real time.

[bpivk]

Originally posted by bothersome:

If you don't get a PE marker, it is an impact, or uh, will be... :)

Or it's a bug. I had a similar problem once and I was not impacting Mun I did crash into Minmus the same day though so it was an ominous sign.

It only happened once though and that's why I attribute it to a random bug. Either way all our solutions are valid.

Hey we can see quite easily... Just F5 time warp and if you crash it's normal. If you don't then it's a bug. Let's make a nice experiment in the name of science.

[Un]

Originally posted by Svillefan08:

Here is my orbit:

http://steamcommunity.com/profiles/76561198007105306/screenshots/?appid=220200

It sounds like it the periapsis just won't show in a hyperbolic orbit like this. It shows when I made the node to get into this orbit, but disappeared when I deleted the node.

Are you effing serious? You need to burn in the opposite direction in order to achive an orbit. Please DELETE this thread. It's no bug you just don't know how to play the game. I recommend you to go watch Scott Manley videos.

[Maverick]

Originally posted by 4DXtreme690M:

Originally posted by Svillefan08:

Here is my orbit:

http://steamcommunity.com/profiles/76561198007105306/screenshots/?appid=220200

It sounds like it the periapsis just won't show in a hyperbolic orbit like this. It shows when I made the node to get into this orbit, but disappeared when I deleted the node.

Are you effing serious? You need to burn in the opposite direction in order to achive an orbit. Please DELETE this thread. It's no bug you just don't know how to play the game. I recommend you to go watch Scott Manley videos.

Whoa. Dude, settle down. It's a fair question and a lot of guys suffer from lack of Pe ocassionally (among other things) :)