The elong program tells you the angle (elongation) between two points in the sky, given the right ascension and declination of each.
I wrote the program.
The elong program has these options:
Usage: elong ra1 dec1 ra2 dec2 ra format: Hh or HhMm or HhMmSs (any can be decimals) dec format: Do or DoM' or DoM'S" (any can be decimals) with optional + or - before the degsExample:
elong 3h12 14o7 7h33 -27o5and it tells you
angle = 75.495733 degrees = 75o 29' 45"