Derelict Satellites in Heliocentric Orbit
23 entries in the Derelict Satellites in Heliocentric Orbit compendium.
Herschel Space ObservatoryESA's far-infrared and submillimetre observatory at L2.Luna 1First human-made object in heliocentric orbit.Mariner 3Failed Mars flyby probe due to payload fairing separation issue.Mariner 6Mariner 6 flew by Mars in 1969, studying its surface and atmosphere.Mariner 6 and 7First dual Mars flyby mission, 1969.Mariner 7Mariner 7 flew over Mars' south pole, returning better pictures than its twin.Mariner 10First spacecraft to visit Mercury and use gravity assist.Mars 1First Soviet Mars probe, lost contact before reaching the planet.Mars 4Soviet Mars orbiter foiled by computer failure.Mars 6Soviet Mars lander lost contact during descent.Mars 7Soviet Mars lander that failed to enter the Martian atmosphere.Mars ObserverLost before Mars orbital insertion in 1993.Nozomi (spacecraft)Japanese Mars orbiter that failed due to electrical failure.Phobos 1Soviet Mars probe lost to a single-character command error.Pioneer 6Oldest operating space probe until surpassed by Voyager 2.Pioneer 7Solar-orbiting probe launched in 1966, still potentially contactable.Pioneer 8Solar-orbiting probe launched in 1967 for interplanetary measurements.Pioneer 9Pioneer 9 last contacted in 1983; 1987 attempt failed.Ranger 5Ranger 5 lost power and missed the Moon.Shin'en (spacecraft)Japanese student spacecraft lost after launch toward Venus.Spitzer Space TelescopeInfrared space telescope in Earth-trailing heliocentric orbit, 2003–2020.Venera 2Soviet Venus probe that lost contact after its flyby.Zond 2Soviet Mars probe that lost contact before its flyby.
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