Light detection module for star tracking

A light detector module for star tracking comprises at least two detectors (1,1'), each mounted at the bottom of a protection case (2,2'), the axes (3,3') of which protection cases being located within a common plane P1 and extending in a first angle area A1 between a first inclination angle ± to a second inclination angle ². The end of each protection case is truncated by mainly of at least nearby parallel truncation planes P2, P2' which are mainly perpendicular to said plane P1 and which, moreover, incline, for each protection case, under a third inclination angle ³ being within said first angle area A1. preferably, the third inclination angle ³ is between a second angle area A2, mainly extending around the value (± + ²) / 2, e.g. between the value ((± + ²) / 2) - 15°) and ((± + ²) / 2) + 15°), or to provide module symmetry equal to (± + ²) / 2. Preferably, the end of each protection case are truncated by nearby parallel truncation planes P2, P2', however, having a small positive deviation angle µ e.g. between 0 and 5°.