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STSS DEMO 2 (USA 209)

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STSS DEMO 2 (USA 209) is classified as:


NORAD ID: 35938
Int'l Code: 2009-052B
Perigee: 1,339.9 km
Apogee: 1,362.7 km
Inclination: 58.0 °
Period: 112.6 minutes
Semi major axis: 7722 km
RCS: Unknown
Launch date: September 25, 2009
Source: United States (US)
Launch site: AIR FORCE EASTERN TEST RANGE (AFETR)

STSS DEMO 2 (USA 209) is part of a $1.5 billion project known as STSS Demo. The satellites will be used together with STSS DEMO 1 by the U.S. Missile Defense Agency to test the "birth to death" tracking of missiles from launch to re-entry. The two craft, weighing nearly 5,000 pounds [2,268 kg] at launch and each having pairs of power-generating solar wings, are equipped with infrared and visible sensors to spot missile launches, track the vehicles through space and observe the entry back into the atmosphere. By working together from separate vantage points in low-Earth orbit, their imagery will combine to provide 3-D tracking of objects.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 35938U 09052B   17256.84482166 0.00000000  00000-0  00000-0 0    07
2 35938  57.9883 144.1534 0014794  51.2203 308.7797 12.79331606    09
Source of the keplerian elements: McCants