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Celestrak provided by Dr. T.S. Kelso, includes visible objects, openly available [22] SpaceTrack maintained by the United States Strategic Command provides orbital information on unclassified satellites requires an account but is available for educational and hobbyist use as well as military, government and spacecraft and payload owners. [23] [24]
The latest data from non-profit satellite tracker CelesTrak shows that SpaceX has 6,370 active Starlink satellites in low-Earth orbit, with several hundred more inactive or deorbited.
A two-line element set (TLE, or more rarely 2LE) or three-line element set (3LE) is a data format encoding a list of orbital elements of an Earth-orbiting object for a given point in time, the epoch.
The Satellite Catalog Number (SATCAT), also known as NORAD Catalog Number, NORAD ID, USSPACECOM object number, is a sequential nine-digit number assigned by the United States Space Command (USSPACECOM), and previously the North American Aerospace Defense Command (NORAD), in the order of launch or discovery to all artificial objects in the orbits of Earth and those that left Earth's orbit. [1]
Musk has thousands of operational satellites, while Reliance has partnered with Luxembourg-based SES Astra, which non-profit CelesTrak says has 38 satellites that Reliance plans to use.
Source code for algorithm implementations, and TLE interpretation in some cases: python-sgp4 A Python Implementation of the sgp4 model with automatic downloading of TLE Elements from NORAD database.
celestrak (Report). Spacetrack. North American Aerospace Defense Command (NORAD). Archived (PDF) from the original on 3 September 2000. – a serious treatment of orbital elements "FAQ". Celestrak. Two-Line Elements. Archived from the original on 26 March 2016.
Calculations made by CelesTrak had expected these two satellites to miss by 584 m (1,916 ft). [ 9 ] Planning an avoidance maneuver with due consideration of the risk, the fuel consumption required for the maneuver, and its effects on the satellite's normal functioning can also be challenging.