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USA 141

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USA 141 is classified as:

NORAD ID: 25615
Int'l Code: 1998-055C
Perigee: 744.2 km
Apogee: 753.6 km
Inclination: 85.0 °
Period: 99.6 minutes
Semi major axis: 7119 km
RCS: Unknown
Launch date: October 3, 1998
Source: United States (US)

The Advanced Tether Experiment (ATEx, USA 141) was designed to extend the knowledge of control and survivability of tethered space systems. Experiments in active control were to study deployment dynamics via a constant-speed motor and utilization of both in-plane and cross-plane thrusters to excite and arrest librations. Additionally, ATEx was to investigate the survivability of long-life tether materials.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 25615U 98055C   19288.73945010  .00000115  00000-0  27048-4 0  9995
2 25615  84.9901  11.0320 0006561 224.1874 135.8802 14.45076323 21998
Source of the keplerian elements: McCants