Sakigake
Sakigake
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 Sakigake spacecraft | |
| Mission type | Comet flyby |
|---|---|
| Operator | ISAS |
| COSPAR ID | 1985-001A |
| SATCAT no. | 15464 |
| Mission duration | 10 years and 10 months (launch date to date of last data transmission) |
| Spacecraft properties | |
| Launch mass | 138.1 kilograms (304 lb) |
| Start of mission | |
| Launch date | January 7, 1985, 19:27 (1985-01-07UTC19:27Z) UTC |
| Rocket | Mu-3S-II |
| Launch site | Kagoshima |
| End of mission | |
| Last contact | Data: November 15, 1995 (1995-11-16) Beacon: January 8, 1999 |
| Orbital parameters | |
| Reference system | Heliocentric |
| Perihelion | 0.92 astronomical units |
| Aphelion | 1.15 astronomical units |
| Inclination | 0.07 degrees |
| Period | 382.8 days |
| Flyby of 1P/Halley | |
| Closest approach | March 11, 1986, 04:18 UTC |
| Distance | 6,990,000 kilometres (4,340,000 mi) |
Sakigake (さきがけ, lit. "pioneer" or "pathfinder"), known before launch as MS-T5, was Japan's first interplanetary spacecraft, and the first deep space probe to be launched by any country other than the USA or the Soviet Union. It aimed to demonstrate the performance of the new launch vehicle, test the schemes of the first escape from the Earth gravitation for Japan on engineering basis, and observe space plasma and magnetic field in interplanetary space. Sakigake was also supposed to get references[clarification needed] for scientists. Early measurements would be used to improve the mission of the Suisei probe several months later.
Sakigake was developed by the Institute of Space and Astronautical Science for the National Space Development Agency (both of which are now part of the Japanese Aerospace Exploration Agency, or JAXA). It became a part of the Halley Armada together with Suisei, the Soviet/French Vega probes, the ESA Giotto and the NASA International Cometary Explorer, to explore Halley's Comet during its 1986 sojourn through the inner Solar System.
Contents
1 Design
2 Launch
3 Halley encounter
4 Giacobini-Zinner encounter
5 End of mission
6 References
7 External links
Design[edit]
Unlike its twin Suisei, it carried no imaging instruments in its instrument payload.
Launch[edit]
Sakigake was launched January 7, 1985 from Kagoshima Space Center by M-3SII-1 launch vehicle.
Halley encounter[edit]
It carried out a flyby of Halley's Comet on March 11, 1986 at a distance of 6.99 million km.
Giacobini-Zinner encounter[edit]
There were plans for the spacecraft to go on to an encounter with 21P/Giacobini-Zinner in 1998 but the flyby had to be abandoned due to lack of propellant.
End of mission[edit]
Telemetry contact was lost on 15 November 1995, though a beacon signal continued to be received until 7 January 1999.[1][2]
References[edit]
^ "Sakigake - Japan ISAS Halley's Comet Mission Sakigake". Space.about.com. Retrieved 2010-02-01..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ "Sakigake – NASA Master Catalog". Nssdc.gsfc.nasa.gov. Retrieved 2010-02-01.
External links[edit]
- Sakigake
Sakigake Mission Profile by NASA's Solar System Exploration
- Halley's Comet Flyby
Spacecraft missions to dwarf planets, asteroids and comets | ||
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Categories:
- Japanese space probes
- Missions to Halley's Comet
- Artificial satellites orbiting the Sun
- 1985 in spaceflight
- Derelict space probes
- Spacecraft launched in 1985
- Japanese inventions
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