In Galileo's planet pack, there is a moon named Eta. This makes the eta alias unusable.
print BODY("Eta"):apoapsis.
11708000
print eta:apoapsis.
11708000
Is there an alternate way to get at the ETA?
There is a planet named Eta. So eta is both an alias for a body, and for the bound variable. Nothing good comes of that.
I tired print eta:apoapsis and got an error that Eta doesn't have that suffix, which clued me in.