Q: At what times EXACTLY does the Quasar fire?

A: A Non-Damped Quasar will fire when:

a) You enter the sector (Including Twarp)
b) You enter the game in the same sector as the planet
c) You land on the planet
d) You try to leave with an interdictor holding you
e) After you destroy the shields on a planet just before you engage the fighters
f) When you destroy the deployed fighters in the sector
g) Note: If you have a ship in the sector, you CAN teleport to it without being blasted by the Q-Cannon