List of active Solar System probes

This is a list of active space probes which have escaped Earth orbit. It includes lunar space probes, but does not include space probes orbiting at the Sun–Earth Lagrangian points (for these, see List of objects at Lagrangian points). A craft is deemed "active" if it is still able to transmit usable data to Earth (whether or not it can receive commands).

For a list of all Solar System probes, including historic probes, see List of Solar System probes.
Space probes operational as of 2018

The craft are further grouped by mission status – "en route", "mission in progress" or "mission complete" – based on their primary mission. For example, though Voyager 1 is still contactable en route to the heliopause, it is listed as "mission complete" because its primary task of studying Jupiter and Saturn has been accomplished. Once a probe has reached its first primary target, it is no longer listed as "en route" whether or not further travel is involved.

Missions in progress

Moon
  • ARTEMIS P1/P2
    • Mission: studying the effect of the solar wind on the Moon. Originally launched as Earth satellites, they were later repurposed and moved to lunar orbit.
    • Launched: February 17, 2007
    • Destination: Moon
    • Arrival: July 2011
    • Institution: NASA
  • Lunar Reconnaissance Orbiter
    • Mission: Orbiter engaged in lunar mapping intended to identify safe landing sites, locate potential resources on the Moon, characterize the radiation environment, and demonstrate new technology.
    • Launched: 18 June 2009
    • Destination: Moon
    • Arrival: 23 June 2009
    • Institution: NASA
  • Queqiao
    • Mission: Halo orbiter serving as communications satellite for Chang'e 4 lunar far-side mission; conducting joint China-Netherlands low frequency astronomy experiment.
    • Launched: 21:28 UT on 20 May 2018[1]
    • Destination: in halo orbit about Earth-Moon L2
    • Arrival: 14 June 2018
    • Institution: CNSA
  • Lander, Rover: Chang'e 4
    • Mission: Lander engaging in low-frequency radio spectrometry experiment, neutron and dosimetry experiment, and biological experiment. Rover seeking to characterize lunar far-side environment (including possible lunar mantel material) using visible/near-infrared spectrometer, ground penetrating radar, cameras, and neutral particle analyzer.[2]
    • Launched: 18:23 UT on 8 December 2018
    • Destination: Lunar far side
    • Arrival: 02:26 UT on 3 January 2019
    • Institution: CNSA
  • Chandrayaan-2
    • Mission: engaged in lunar topography and mineralogy, elemental abundance, the lunar exosphere, and signatures of hydroxyl and water.
    • Launched: 22 July 2019
    • Destination: Moon
    • Arrival: 7 September 2019
    • Institution: ISRO

Mercury
  • BepiColombo
    • Mission: Spacecraft consists of the Mercury Transfer Module (MTM), Mercury Planetary Orbiter (MPO), and the Mercury Magnetospheric Orbiter (MMO or Mio). MTM and MPO are built by ESA while the MMO is mostly built by JAXA. Once the MTM delivers the MPO and MMO to Mercury orbit, the two orbiters will have the following objectives: to study Mercury's form, interior structure, geology, composition, and craters; to study the origin, structure, and dynamics of its magnetic field; to characterize the composition and dynamics of Mercury's vestigial atmosphere; to test Einstein's theory of general relativity; to search for asteroids sunward of Earth; and to generally study the origin and evolution of a planet close to a parent star.[3]
    • Launched: 01:45:28 UT on 19 October 2018
    • Destination: Mercury
    • Arrival: En route (anticipated to enter Mercury polar orbit on 5 December 2025)
    • Institution: ESA JAXA

Venus
  • Akatsuki
    • Mission: The first Japanese Venusian probe. Also known as Planet-C and Venus Climate Orbiter, Akatsuki failed to enter Venusian orbit in December 2010. It continued to function and entered Venus orbit in 2015.[4][5]
    • Launched: 20 May 2010
    • Destination: Venus
    • Arrival: 7 December 2015
    • Institution: JAXA
    • Subprobes: IKAROS and Shin'en

Mars
The oldest active spacecraft for Mars is 2001 Mars Odyssey
  • 2001 Mars Odyssey
    • Mission: one of six currently active human-made Mars satellites. It is continuing its extended mission to map the surface of Mars and also acts as a relay for the Curiosity rover.[6] Its name is a tribute to the novel and film 2001: A Space Odyssey.
    • Launched: 7 April 2001
    • Destination: Mars
    • Arrival: 24 October 2001
    • Institution: NASA
  • Mars Express
    • Mission: Mars orbiter designed to study the planet's atmosphere and geology, search for sub-surface water, and deploy the Beagle 2 lander.[7] In 2017 the mission was extended until at least the end of 2020.[8]
    • Launched: 2 June 2003
    • Destination: Mars
    • Arrival: 25 December 2003
    • Institution: ESA
    • Lander: Beagle 2 (mission failed; contact lost at separation but found in 2015 on surface)
  • Mars Reconnaissance Orbiter
    • Mission: the second NASA satellite orbiting Mars. It is specifically designed to analyze the landforms, stratigraphy, minerals, and ice of the red planet.
    • Launched: 12 August 2005
    • Destination: Mars
    • Arrival: 10 March 2006
    • Institution: NASA
  • Lander: Curiosity Rover
    • Mission: searching for evidence of organic material on Mars, monitoring methane levels in the atmosphere, and engaging in exploration of the landing site at Gale Crater.
    • Launched: 26 November 2011
    • Destination: Mars
    • Arrival: 6 August 2012
    • Institution: NASA
  • Mangalyaan
    • Mission: the first Indian interplanetary space probe. Objective of the mission is to develop the technologies required for designing, planning, management and operations of an interplanetary mission.
    • Launched: 5 November 2013
    • Destination: Mars
    • Arrival: 24 September 2014
    • Institution: ISRO
  • MAVEN — Mars Atmosphere and Volatile Evolution.
    • Mission: study the Martian upper atmosphere and its gradual loss to space
    • Launched: 18 November 2013
    • Destination: Mars
    • Arrival: September 2014
    • Institution: NASA
  • Trace Gas Orbiter (ExoMars 2016)
    • Mission: study methane and other trace gases in the Martian atmosphere
    • Launched: 14 March 2016
    • Destination: Mars
    • Arrived: 19 October 2016 (Mars orbit insertion), 21 April 2018 (final orbit)
    • Institution: ESA
    • Lander: Schiaparelli (crashed upon landing attempt)
  • Lander: InSight
    • Mission: to study the deep interior of Mars, with a seismometer and a heat-flow probe.
    • Launched: 5 May 2018
    • Destination: Elysium Planitia, Mars
    • Arrival: 29 November 2018
    • Institution: NASA

Asteroids and comets
  • Hayabusa 2
    • Mission: asteroid study and sample-return
    • Launched: 3 December 2014
    • Destination: 162173 Ryugu
    • Arrival: 27 June 2018
    • Institution: JAXA
    • Lander probe: MASCOT and MINERVA-II
  • OSIRIS-REx
    • Mission: asteroid study and sample-return
    • Launched: 8 September 2016
    • Destination: 101955 Bennu
    • Arrival: 3 December 2018
    • Institution: NASA[9]

Heliocentric orbit
  • Chang'e 2
    • Mission: lunar exploration, asteroid fly-by, develop Chinese deep-space capability
    • Launched: 1 October 2010
    • First destination: Moon
    • Arrival: 6 October 2010
    • Left Moon: 8 June 2011
    • Second destination: Earth–Moon Lagrangian point L2
    • Arrived: 25 August 2011
    • Left L2 Lagrangian point: April 2012
    • Third destination: 4179 Toutatis
    • Arrived: 13 December 2012
    • Left 4179 Toutatis: 13 December 2012
    • Destination: heliocentric orbit
    • Institution: CNSA
  • Parker Solar Probe
    • Mission: observation of solar wind, magnetic fields, and coronal energy flow.
    • Launched: 12 August 2018
    • Destination: low solar orbit, perihelion 6.9 million km
    • Arrival: 19 January 2019[10][11][12][13]
    • Institution: NASA
  • Solar Orbiter
    • Misson: detailed measurements of the inner heliosphere and nascent solar wind, and close observations of the polar regions of the Sun.
    • Launched: 10 February 2020
    • Destination: High inclination solar orbit
    • Arrival: Operational orbit in 2023

Outer Solar System
Montage of planets and some moons that the two Voyager spacecraft have visited and studied, still active in the 2010s they are heading out into interstellar space returning data from newly explored distances
  • Juno
    • Mission: studying Jupiter from polar orbit. Intended to de-orbit into the Jovian atmosphere after 2021.
    • Launched: 5 August 2011
    • Destination: Jupiter
    • Arrival: 4 July 2016
    • Institution: NASA
  • New Horizons
    • Mission: the first spacecraft to study Pluto up close, and ultimately the Kuiper Belt. It was the fastest spacecraft when leaving Earth and will be the fifth probe to leave the Solar System.
    • Launched: 19 January 2006
    • Destination: Pluto and Charon
    • Arrival: 14 July 2015
    • Left Charon: 14 July 2015
    • Destination: 486958 Arrokoth
    • Arrival: 1 January 2019
    • Institution: NASA
  • Voyager 1
    • Mission: investigating Jupiter and Saturn, and the moons of these planets. Its continuing data feed offered the first direct measurements of the heliosheath and the heliopause. It is currently the farthest man-made object from Earth, as well as the first object to leave the heliosphere and cross into interstellar space. As of November 2017 it has a distance from the Sun of about 140 astronomical units (AU)[14] (21 billion kilometers, or 0.002 light years), and it will not be overtaken by any other current craft. In August 2012, Voyager 1 became the first human-built spacecraft to enter interstellar space. It is hoped that Voyager 1 will continue operating until at least 2020.
    • Launched: 5 September 1977
    • Destination: Jupiter and Saturn
    • Arrival: January 1979
    • Institution: NASA
    • Primary mission completion: November 1980
    • Current trajectory: entered interstellar space August 2012
  • Voyager 2
    • Mission: studying all four gas giants. This mission was one of NASA's most successful, yielding a wealth of new information. As of November 2017 it is some 116 AU from the Sun (17.34 billion kilometers),[14] and it is hoped the probe will continue to operate until at least 2020. It has left the heliosphere and crossed into interstellar space in December 2018. As with Voyager 1, scientists are now using Voyager 2 to learn what the Solar System is like beyond the heliosphere.
    • Launched: 20 August 1977
    • Destination: Jupiter, Saturn, Uranus, Neptune
    • Arrival: 9 July 1979
    • Institution: NASA
    • Primary mission completion: August 1989
    • Current trajectory: entered interstellar space December 2018

Retired missions
  • Pioneer 6
    • Mission: measurements of the solar wind, solar magnetic field and cosmic rays. Oldest functioning probe (if still operating). Contact was last attempted 8 December 2000 to celebrate its 35th anniversary, and the attempt was successful.[15]
    • Launched: 16 December 1965
    • Destination: heliocentric orbit
    • Institution: NASA
    • Mission completion: ?
    • Current trajectory: heliocentric orbit
  • Pioneer 7
    • Mission: measurements of the solar wind, solar magnetic field and cosmic rays. Last contacted 31 March 1995; no attempt has been made since, and this probe may or may not be operational.
    • Launched: 17 August 1966
    • Destination: heliocentric orbit
    • Institution: NASA
    • Mission completion: ?
    • Current trajectory: heliocentric orbit
  • Pioneer 8
    • Mission: measurements of the solar wind, solar magnetic field and cosmic rays. Last contacted on 22 August 1996; no attempt has been made since, and this probe may or may not be operational.
    • Launched: 8 November 1967
    • Destination: heliocentric orbit
    • Institution: NASA
    • Mission completion: ?
    • Current trajectory: heliocentric orbit
  • ICE
    • Mission: studying the interaction between the solar wind and (1) the Earth's magnetosphere, (2) the tail of comet Giacobini-Zinner, (3) the tail of Halley's Comet. Contact with the probe was lost on 16 September 2014. It is unknown whether contact can be reestablished because the probe's exact orbit is uncertain.
    • Launched: 12 August 1978
    • Destination: halo orbit around Earth-Sun Lagrangian point L1
    • Institution: NASA
    • Mission completion: 1997
    • Current trajectory: heliocentric orbit
  • Giotto
    • Mission: flyby and observation of Halley's Comet and Comet Grigg-Skjellerup to capture scientific data and images of the nucleus. The multicolor camera was destroyed in the encounter with Halley, but the probe remained otherwise functional for the second encounter.
    • Launched: 2 July 1985
    • Destination: Comet Halley
    • Arrival: 14 March 1986
    • Institution: ESA
    • Mission completion: 14 March 1986 (Halley), 10 July 1992 (Grigg-Skjellerup)
    • Current trajectory: heliocentric orbit
  • Genesis
    • Mission: solar wind sample return
    • Launched: 8 August 2001
    • Destination: halo orbit around Sun-Earth Lagrangian point L1
    • Arrival: 16 November 2001
    • Institution: NASA
    • Mission completion: sample capsule returned to Earth 8 September 2004; parachutes failed to open, some samples contaminated
    • Current trajectory (spacecraft bus): heliocentric orbit near Sun-Earth L2 point
Artist's concept of Cassini's orbit insertion around Saturn
  • Cassini–Huygens
    • Mission: Cassini orbiter studying Saturn and its moons after passing Venus and Jupiter; Huygens landing probe investigating Titan. Cassini primarily investigated Saturn's rings, its magnetosphere, and the geologic composition of its satellites.
    • Launched: 15 October 1997
    • Destination: Saturn
    • Arrival: 1 July 2004 (Saturn), 14 January 2005 (Titan)
    • Crashed: 15 September 2017
    • Institution: collaboration between NASA, ESA and ASI

Recently ended
  • Chang'e 5-T1
    • Mission: re-entry test for unmanned lunar sample return mission, plus several secondary experimental payloads
    • Launched: 23 October 2014
    • Destination: Moon
    • Arrival: 13 January 2015
    • Institution: CNSA
  • Dawn
    • Mission: studying asteroid 4 Vesta and dwarf planet Ceres
    • Launched: 27 September 2007
    • Initial destination: Vesta
    • Vesta arrival: 16 July 2011
    • Left Vesta: 5 September 2012
    • Second destination: Ceres
    • Arrival: 6 March 2015
    • Institution: NASA
    • Mission completion: 1 November 2018, spacecraft ran out of hydrazine propellant
    • Current trajectory: in orbit around Ceres

See also

References
  1. "NASA Space Science Data Coordinated Archive, Mission ID: QUEQIAO". NASA. Retrieved 26 January 2020.
  2. "NASA Space Science Data Coordinated Archive, Mission ID: 2018-103A". NASA. Retrieved 26 January 2020.
  3. "NASA Space Science Data Coordinated Archive, Mission ID: BEPICLMBO". NASA. Retrieved 26 January 2020.
  4. "Crippled space probe bound for second chance at Venus". Spaceflight Now. Retrieved 21 November 2011.
  5. "Venus Climate Orbiter "AKATSUKI" Inserted Into Venus' Orbit". Japan aerospace exploration agency. 9 December 2015. Retrieved 28 December 2015.
  7. "ESA Science & Technology: Mars Express". European Space Agency. Retrieved 26 October 2018.
  8. "ESA Science & Technology: Green light for continued operations of ESA science missions". European Space Agency. 7 December 2017. Retrieved 26 October 2018.
  9. https://solarsystem.nasa.gov/missions/osiris-rex/in-depth/
  10. Frazier, Sarah (28 January 2019). "All Systems Go As Parker Solar Probe Begins Second Sun Orbit". NASA. Retrieved 2 February 2019.
  11. Lewin, Sarah (29 January 2019). "Once Around the Sun! NASA's Parker Solar Probe Aces 1st Trip Around Our Star". Space.com. Retrieved 2 February 2019.
  12. Dvorsky, George (30 January 2019). "NASA's Parker Solar Probe Is Once Again Heading Toward the Sun". Gizmodo. Retrieved 2 February 2019.
  13. Whitwam, Ryan (31 January 2019). "Solar Probe Begins Its Second Orbit of the Sun". ExtremeTech. Retrieved 2 February 2019.
  14. JPL.NASA.GOV. "Where are the Voyagers – NASA Voyager". voyager.jpl.nasa.gov. Retrieved 2017-11-14.
  15. "Solar System Exploration: Missions: By Name: P: Pioneer 6". Solar System Exploration. Retrieved 1 May 2015.
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