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Track STSS DEMO 1 (USA 208) now!
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STSS DEMO 1 (USA 208) is classified as:

NORAD ID: 35937
Int'l Code: 2009-052A
Perigee: 1,339.4 km
Apogee: 1,363.3 km
Inclination: 58.0 °
Period: 112.6 minutes
Semi major axis: 7722 km
RCS: Unknown
Launch date: September 25, 2009
Source: United States (US)

STSS DEMO 1 (USA 208) is part of a $1.5 billion project known as STSS Demo. The satellites will be used together with STSS DEMO 2 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 35937U 09052A   17145.95932131 0.00000000  00000-0  00000-0 0    07
2 35937  57.9867  83.8506 0015464 266.8749  93.1250 12.79324388    00
Source of the keplerian elements: McCants