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Target: Mars  
State: Planned

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Kind: Magnetospheric research ISEE-3: Sun/Earth L1 orbiter ICE: 21P/G-Z & Halley fly-by

State: Failure

Place: Sun

Operator: NASA

Instruments: 1) Solar Wind Plasma Experiment, 2) Helium Vector Magnetometer, 3) Low Energy Cosmic Ray Experiment, 4) Medium Energy Cosmic Ray Experiment, 5) High Energy Cosmic Ray Experiment, 6) Plasma Wave Instrument, 7) Low Energy Proton Experiment, 8) Cosmic Ray Electrons and Nuclei, 9) X-Rays and Electrons Instrument, 10) Radio Mapping Experiment, 11) Plasma Composition Experiment, 12) Heavy Isotope Spectrometer Telescope, 13) Ground Based Solar studies Experiment,



Duration: Launch to last routine contact: 18 years, 8 months, 22 days Launch to last contact: 36 years, 1 month, 3 days

Mission Ending

Deactivated: Contact suspended: May 5, 1997 (1997-05-05)

Last Contact: September 16, 2014


Rocket: Delta 2914 #144

Kind: NASA

Manufacturer: Fairchild Industries

Mass: 479 kg (1,056 lb)

Launch Site: Cape Canaveral SLC-17B


"Requesting permission for flyby." Maverick - Top Gun


Reference System: Heliocentric


"The journey, not the arrival, matters; the voyage, not the landing." - Paul Theroux

The International Cometary Explorer (ICE) spacecraft (designed and launched as the International Sun-Earth Explorer-3 (ISEE-3) satellite), was launched August 12, 1978, into a heliocentric orbit. It was one of three spacecraft, along with the mother/daughter pair of ISEE-1 and ISEE-2, built for the International Sun-Earth Explorer (ISEE) program, a joint effort by NASA and ESRO/ESA to study the interaction between the Earth's magnetic field and the solar wind. ISEE-3 was the first spacecraft to be placed in a halo orbit at the L1 Earth-Sun Lagrangian point. Renamed ICE, it became the first spacecraft to visit a comet, passing through the plasma tail of comet Giacobini-Zinner within about 7,800 km (4,800 mi) of the nucleus on September 11, 1985. NASA suspended routine contact with ISEE-3 in 1997, and made brief status checks in 1999 and 2008. On May 29, 2014, two-way communication with the spacecraft was reestablished by the ISEE-3 Reboot Project, an unofficial group with support from the Skycorp company. On July 2, 2014, they fired the thrusters for the first time since 1987. However, later firings of the thrusters failed, apparently due to a lack of nitrogen pressurant in the fuel tanks. The project team initiated an alternative plan to use the spacecraft to "collect scientific data and send it back to Earth", but on September 16, 2014, contact with the probe was lost.