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Track MMS 2 now!
MMS 2 is classified as:

NORAD ID: 40483
Int'l Code: 2015-011B
Perigee: 2,354.8 km
Apogee: 179,710.3 km
Inclination: 29.1 °
Period: 5,042.2 minutes
Semi major axis: 97403 km
RCS: Unknown
Launch date: March 13, 2015
Source: United States (US)

MMS (Magnetospheric Multiscale) is a Solar-Terrestrial Probe mission comprising four identically instrumented spin-stabilized spacecraft to discover the fundamental physics of magnetic reconnection using Earth's magnetosphere as a laboratory. The MMS spacecraft are being developed at NASA's Goddard Space Flight Center (GSFC) in Greenbelt, Maryland. GSFC is also responsible for the overall management of the MMS mission and mission operations. The mission is to be launched in October 2014 and will have an duration of two years (Prime Mission) + 6 months (launch, checkout, commissioning).
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 40483U 15011B   23146.74297731 -.00000329  00000-0  00000-0 0  9998
2 40483  29.0911  66.4196 9104157  93.9247  29.7307  0.28558840 14346
Source of the keplerian elements: AFSPC