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NORAD ID: 41457
Int'l Code: 2016-025B
Perigee: 717.9 km
Apogee: 719.9 km
Inclination: 98.2 °
Period: 99.0 minutes
Semi major axis: 7089 km
RCS: Unknown
Launch date: April 26, 2016
Source: France (FR)

MICROSCOPE (Micro-Satellite à traînée Compensée pour l’Observation du Principe d’Equivalence) is a satellite that will test the equivalence principle described by Albert Einstein, with a precision on the order of 10-15. In space, it is possible to study the relative motion of two bodies in almost perfect and permanent free fall aboard an orbiting satellite, shielded from perturbations encountered on Earth (notably seismic), over the course of several months. To achieve this, two concentric cylindrical test masses made of different materials – one titanium and one a platinum-rhodium alloy – will be minutely controlled to keep them motionless with respect to the satellite inside independent differential electrostatic accelerometers. If the equivalence principle is verified, the two masses will be subjected to the same control acceleration. If different accelerations have to be applied, the principle will be violated: an event that would shake the foundations of physics.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 41457U 16025B   21131.01903271  .00000113  00000-0  37292-4 0  9998
2 41457  98.2483 136.7552 0001374 118.6402 241.4933 14.54255974267538
Source of the keplerian elements: AFSPC