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Below is a list of artificial objects currently in heliocentric orbit. This list does not include objects that are escaping from the Solar System, upper stages from robotic missions (only the S-IVB upper stages from Apollo missions with astronauts are listed), or objects in the Sun–Earth Lagrange points. == United States == The United States has placed in heliocentric orbit: * Pioneer 4 – Moon (1959) * Ranger 3 – Moon (1961) * Ranger 5 – Moon (1963) * Mariner 2 – Venus (1962) * Mariner 3 – Intended for Mars, communication lost when launch shroud failed to separate (1964) * Mariner 4 – Mars (1964) * Mariner 5 – Venus (1967) * Pioneer 5, Pioneer 6, Pioneer 7, Pioneer 8, and Pioneer 9 – Sun (1966-1969) * S-IVB upper stage for Apollo 8 (1968) * S-IVB for Apollo 9 (1969) * S-IVB and LM ''Snoopy'' (ascent stage) for Apollo 10 (1969) * S-IVB upper stage for Apollo 11 (1969) * Mariner 6 & Mariner 7 – Mars (1969) * S-IVB for Apollo 12 (1969) – temporarily recaptured in Earth orbit 2002, escaped again 2003 * ICE – Comets Giocabinni-Zinner & Halley (1974-1987) * Mariner 10 – Venus and Mercury (1974-1975) * Mars Observer (1992) – Intended for Mars, failed prior to orbital insertion (1992) * CONTOUR – Intended to flyby several comets, failed after launch (2002), seen as three separate fragments * Deep Impact – Comet Tempel 1 * Genesis – Solar wind sample mission * Stardust – Comet Wild 2 * Spitzer Space Telescope (active) * Kepler Mission (active) * STEREO-A and STEREO-B (active) On Apollos 8 and 10–17, each S-IVB upper stage jettisoned four sections of a truncated conical adapter that supported the Apollo service module and (except for Apollo 8) enclosed the Lunar Module. These panels are in heliocentric orbit, including those from Apollos 13–17 whose S-IVBs impacted the moon, as the S-IVBs jettisoned them before maneuvering themselves into lunar impact trajectories. The panels continued on lunar flyby trajectories into heliocentric orbit. The adapter panels on Apollo 9 were jettisoned in earth orbit before the S-IVB burned into an earth escape trajectory. They eventually decayed. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of artificial objects in heliocentric orbit」の詳細全文を読む スポンサード リンク
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