Getting a satellite to a specific point in an orbit, how?

[CatastrophicFailure]

So I've learned how to get a nice evenly spaced network of comm satellites, but how do I time a maneuver to get a satellite to a specific point in a orbit before circularizing? Like directly over KSC in geosync, or opposite the Mün & what pass for its Lagrange points?

[SnappingTurtle]

If the satellite is already in geosynchronous orbit I think the best thing to do would be to drop your orbit slightly and wait until you're approaching the target and fix your orbit again. Or if you have the fuel you could burn at some angle between retrograde and radial that would slow your orbit but not lower your altitude. Or between prograde and anti-radial to increase your speed but not your altitude.

There are no Lagrange points in KSP at this time.

Remember that any orbit is approximate. Your satellites will be off significantly after the time it takes to complete a Jool visit and return. If you want them to be perfect and stay that way you should edit the save file.

[maackey]

MechJeb has really good information readouts (that are customizeable as well) so you can see your orbital period and match it up with other satellites/spots on the ground. For example, if you want a geostationary satellite over KSC, but are on the exact opposite side of the world in a geostationary orbit, you could burn retrograde until your orbital period is 5 hours (instead of 6) and wait for three orbits before burning prograde to geostationary orbit again (alternatively burn 3x as long so your period is 3 hours and after a single orbit you should be pretty close)

But as SnappingTurtle said, orbits will have rounding errors and drift over time, so unless you edit the save file (and never revisit those satellites again) they will drift. Scott Manley has a pretty good video on editing saves.

Here are the values I used in mine. The satellites are in an equitorial 1000km orbit spaced out 90 degrees apart. Alternatively I'm pretty sure Hyperedit can do the same things, but within the game.

-- CommSat Alpha --
ORBIT
			{
				SMA = 1600000
				ECC = 0
				INC = 0
				LPE = 0
				LAN = 0
				MNA = 0
				EPH = 1234567
				REF = 1
				OBJ = 1
			}
-- CommSat Beta --
 ORBIT
			{
				SMA = 1600000
				ECC = 0
				INC = 0
				LPE = 0
				LAN = 0
				MNA = 3.14159265359
				EPH = 1234567
				REF = 1
				OBJ = 1
			}
-- CommSat Theta --
ORBIT
			{
				SMA = 1600000
				ECC = 0
				INC = 0
				LPE = 0
				LAN = 0
				MNA = 4.71238898038
				EPH = 1234567
				REF = 1
				OBJ = 1
			}
-- CommSat Gamma --
ORBIT
			{
				SMA = 1600000
				ECC = 0
				INC = 0
				LPE = 0
				LAN = 0
				MNA = 1.57079632679
				EPH = 1234567
				REF = 1
				OBJ = 1
			}

[mellojoe]

Another thing you can do. Put the apoapsis exactly on the point you want the satellite to be. Then, when you reach that Ap, do a burn to circularize. You can do this from a lower orbit or a higher orbit (using the Pe).

Scott Manly did a video where he set his orbit to be a 4-hour period with the AP at Kerbin Geostationary Orbit. With Kerbit rotation at a 6 hour period, each time he hit AP it was 2 hours different from the time before. This allowed him to drop 3 satellites exactly 2 hours apart, each in Geostationary orbit. It was a clever trick that required a mod to display orbital period. But the concept can easily be done without being as precise as he was.