Longitude of ascending node

[downloaderfan]

I didn't quite get it.

I believe that you should simply depart with ecliptic inclination

Are u saying i should have the same ecliptic inclination and LAN in a lunar orbit?
If i depart to earth from that orbit at the right time,will i reach earth periapsis with same ecliptic inclination and LAN?

 

[Cras]

I didn't quite get it.



Are u saying i should have the same ecliptic inclination and LAN in a lunar orbit?
If i depart to earth from that orbit at the right time,will i reach earth periapsis with same ecliptic inclination and LAN?

Leave the Moon so you are headed to Earth. Once you get far enough away, you figure this out by opening Orbit MFD, set reference to Earth, watch the number at the bottom center. When it hits G 0.50 and turns from red to green, you are now in the Earth SOI.

Open up IMFD, target the thing you want to reach in LEO, find a solution that uses the least dV, and fire away.

 

[downloaderfan]

Leave the Moon so you are headed to Earth. Once you get far enough away, you figure this out by opening Orbit MFD, set reference to Earth, watch the number at the bottom center. When it hits G 0.50 and turns from red to green, you are now in the Earth SOI.

Open up IMFD, target the thing you want to reach in LEO, find a solution that uses the least dV, and fire away.

Thanks for the reply Cras,i do understand what u said but it isn't something i was expecting.Perhaps its my fault as i didn't explain my problem very clearly.

So here is the thing.I was in a retro gade 180 degrees lunar orbit,i had arrive earth at the inc and LAN i mentioned above,so as to eject for mars.So i did a transX plan which took me to earth,i had to use plane change which costed me a dv of 150 more than usual,so i wanted to know whether there is some inc and LAN i can have in a lunar orbit so as to arrive earth at that inc and LAN without plane change.

From my experience,just ejecting from moon at any inclination and then doing a plane change costs much more fuel than doing a plane change at the moon itself.

 

[Enjo]

The "plane change" is cheaper if done in space between the two bodies because of small velocity you then have. Hence we recommend IMFD along the way. Orbit around the Moon doesn't matter here except for being able to eject retrograde wrt the Earth's orbit.

 

[statickid]

Yep, in my experience plane changes are extremely cheap at a great distance. You can even consider doing them with RCS in some cases.