The coordinates are X 11, Y 82.
She the PRINCESS is on a asteroid being held hostage by Morder
if you mean the planet in the asteroid belt then it is X:11 Y:82
After you beat Fire planet planet,and Jungle planet the princess will be waiting on one of the asteroids in the asteroid belt.
She isn't on a planet.she is on a asteroid (if you are talking about astro-knights island)
it is x:21 y:81 -yepp
Go to the lower left, towards the asteroid belt, and look for an extra planet.
you go to a mysterious planet in the asteroid belt then get the key and then beat the monster with the owl and then take the princess!
After you defeat the ice plant you go to the fire plant or jungle plant. But if you were already there you can go to the asteroid belt where there is a castle shaped like an asteroid.
On Mordred's secret asteroid. The space cordinates are X-11, Y-83.
fly southeast
TO get into the asteroid castle you have to complete the puzzle on the door.
X is 11 Y is 82 or 83 something around there...you can't miss it...the planet has silver stickes sticking out of it(: