What are the minimum/maximum temperatures in which Vespera Passengers can operate?

What are the minimum/maximum temperatures in which Vespera Passengers can operate?

Vespera Passengers is designed for use between -10° and 40°. Below -10°C, the instrument may still work, without risk of damage, but :
  1. the quality of tracking may be affected, resulting in finer, rounder stars
  2. the battery may be drained more quickly