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Delta 7925-10C

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Status: Retired 2007. First Launch: 2007-02-17. Last Launch: 2007-02-17. Number: 1 .

• Themis P1 - . Payload: Themis A. Mass: 125 kg (275 lb). Nation: USA. Agency: NASA. Manufacturer: Swales. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Themis. USAF Sat Cat: 30580 . COSPAR: 2007-004A. Apogee: 87,254 km (54,217 mi). Perigee: 1,003 km (623 mi). Inclination: 14.10 deg. Period: 1,882.70 min.

  The five simultaneously-launched Time History of Events and Macroscale Interactions during Substorms (THEMIS) satellites were the fifth medium-class mission under NASA's Explorer Program. They formed part of a combined ground- and space- based system designed to determine what physical process in near-Earth space initiate the violent eruptions of the aurora that occur during substorms in the Earth's magnetosphere.

• Themis P2 - . Payload: Themis B. Mass: 125 kg (275 lb). Nation: USA. Agency: NASA. Manufacturer: Swales. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Themis. USAF Sat Cat: 30581 . COSPAR: 2007-004B. Apogee: 87,114 km (54,130 mi). Perigee: 1,004 km (623 mi). Inclination: 14.10 deg. Period: 1,878.80 min.

• Themis P3 - . Payload: Themis C. Mass: 125 kg (275 lb). Nation: USA. Agency: NASA. Manufacturer: Swales. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Themis. USAF Sat Cat: 30582 . COSPAR: 2007-004C. Apogee: 87,792 km (54,551 mi). Perigee: 736 km (457 mi). Inclination: 14.20 deg. Period: 1,890.30 min.

• Themis P4 - . Mass: 125 kg (275 lb). Nation: USA. Agency: NASA. Manufacturer: Swales. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Themis. USAF Sat Cat: 30797 . COSPAR: 2007-004D. Apogee: 67,517 km (41,953 mi). Perigee: 4,048 km (2,515 mi). Inclination: 4.60 deg. Period: 1,435.90 min.

• Themis P5 - . Mass: 125 kg (275 lb). Nation: USA. Agency: NASA. Manufacturer: Swales. Class: Earth. Type: Magnetosphere satellite. Spacecraft: Themis. USAF Sat Cat: 30798 . COSPAR: 2007-004E. Apogee: 67,523 km (41,956 mi). Perigee: 4,045 km (2,513 mi). Inclination: 5.10 deg. Period: 1,436.00 min.