Not really such thing as an effective range………depends on the target aspect angle and speed……..and probably irrelevant for the pilots because in close combat they will just fire when they can whether its a snap shot or what in X m/s. The UB driver has to estimate whereas the F-16 pilot can lock the MiG and get the dynamic range on the HUD….or may not bother.

AIM-9P-1, -2, -3 = rear aspect IR
AIM-9P-4, -5 = all aspect IR

Pass user dependent I expect