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TESS is classified as:

NORAD ID: 43435
Int'l Code: 2018-038A
Perigee: 150,495.3 km
Apogee: 337,782.8 km
Inclination: 46.2 °
Period: 20,796.8 minutes
Semi major axis: 250509 km
RCS: Unknown
Launch date: April 18, 2018
Source: United States (US)

The Transiting Exoplanet Survey Satellite (TESS) is the next step in the search for planets outside of our solar system, including those that could support life. The mission will find exoplanets that periodically block part of the light from their host stars, events called transits. TESS will survey 200,000 of the brightest stars near the sun to search for transiting exoplanets. TESS scientists expect the mission will catalog thousands of planet candidates and vastly increase the current number of known exoplanets. Of these, approximately 300 are expected to be Earth-sized and super-Earth-sized exoplanets, which are worlds no larger than twice the size of Earth. TESS will find the most promising exoplanets orbiting our nearest and brightest stars, giving future researchers a rich set of new targets for more comprehensive follow-up studies.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 43435U 18038A   24071.79300219 -.00001182  00000-0  00000+0 0  9996
2 43435  46.2423  66.4598 3738123 145.8677 353.3639  0.06924131   946
Source of the keplerian elements: AFSPC