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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : USA
Date of Cancellation: Nov. 19, 2020
Printed: 250 units Kind of Event : Launch Launch pad : USA KSC Florida
habité?/manned?: robot Mission type : Universe Observation
ou?/where?: au sol - ground
autographe?: non - none
Description : 19 Nov. 2020. - The mission consists of two basically identical satellites 6U (2√ó2√ó1.5U) CubeSats of a joint weight of 25 kg. The satellite with the terminator tape is called Alchemy, while the reference satellite is called Augury. After deployment, the two spacecraft split up and one deploys the 70 m Terminator tether, while the other one decays naturally to provide a direct comparisson. It is expected, that the satellite with Terminator Tape will reenter after about two to four weeks, while the other will remain about eight months in orbit. Millennium will use radar to track the satellites and collect data.