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Track IRIDIUM 129 now!
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IRIDIUM 129 is classified as:

NORAD ID: 42958
Int'l Code: 2017-061D
Perigee: 783.0 km
Apogee: 786.6 km
Inclination: 86.4 °
Period: 100.4 minutes
Semi major axis: 7155 km
RCS: Unknown
Launch date: October 9, 2017
Source: United States (US)

IRIDIUM 129 is one of the 10 Iridium satellites placed on orbit by a SpaceX Falcon 9 rocket on October 9, 2017. All satellites were inserted into Plane 4 of the Iridium constellation, which is spread around the globe in six orbital planes, or pathways, to ensure worldwide coverage. The Iridium fleet requires at least 66 operational satellites for constant global service. Designed for 15-year lifetimes, the new satellites replace aging spacecraft that have relayed voice and data traffic around the world since the late 1990s and early 2000s. All of the Iridium Next satellites host radio receivers for Aireon, an affiliate of Iridium established in partnership with air traffic control authorities in Canada, Ireland, Italy and Denmark.
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):
1 42958U 17061D   18081.87942030 +.00000060 +00000-0 +14459-4 0  9997
2 42958 086.4025 202.3434 0002563 109.7647 250.3826 14.34215159023616
Source of the keplerian elements: AFSPC