what are all of the orbit pairs?
ab-cd, ab, cd, ca, ai, ce, ef, eg, gh
what is the separation number in arcsecs for each pair?
208.2, 2.3, 2.4, 0.1, 149.6, 63.7, 46, 50, 35
along with ab, which other pair's separation is between 2 and 3?
cd