Objectives and Applications
Five nearly identical probes which study energy releases in Earth's magnetosphere, known as substorms. In 2010, after the end of THEMIS’ prime mission, two of the spacecraft were repurposed to start a new mission: ARTEMIS. The three remaining THEMIS probes continue to orbit Earth, sending back valuable information to help scientists further understand substorms.
Full Name
Time History of Events and Macroscale Interactions during Substorms
Mission Status
Operational (extended)
Mission Agencies
Launch Date
17 Feb 2007
Mission Links
EOL Date
Dec 2025
Orbit Type
Highly elliptical
Orbit Period
Orbit Sense
Orbit Inclination
Orbit Altitude
Orbit Longitude
NORAD Catalog #
International Designator
No IDN OpenSearch datasets found.