In GURPS Traveller - Interstellar Wars, it's mentioned that 
"The plane of the system's orbit faces Sol almost head on, so the Sun can't be seen from the European settlements. In the north, however, it is visible high in the sky for the entire year, about 15 degrees from the celestial pole". 
That implies that the orbit of the planets around Alpha Centauri A is not coplanar with Alpha Centauri B's orbit around Alpha Centauri A, which should make for interesting day-night cycles, but setting that aside, the interesting comment was that the Sun is about 15 degrees from the celestial pole of Prometheus. 
I might have missed a few things across the various Traveller canonical sources, but where was it described that the European colonies were on the southern continent at Prometheus? What is the pole star or direction of the pole for Prometheus, and is there a map of Prometheus?