The first thing to understand is Lylat is a binary system; Lylat-Solar.
The second is understanding lagrange points. You see, the asteroids are clearly at L1 of Corneria-Lylat system. Venom and Corneria are locked at each other's L3, as is Katina locked to Macbeth. There are interesting effects in the L4 and L5 of Corneria and Venom with the smaller planets. Gravitational effects between Fortuna and Titania form Sector X, and the instability between Aquas and Zoness create the asymmetrical Y and Z sectors.
The only unknowns are Area 6 and Bolse Observatory. Both appear under Venom's influence, but no gravitational model matches their behavior. We've dispatched James McCloud, Peppy Hare, and Pigma Dengar to investigate.