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This is a list of known objects which have been, are or are planned to occupy any of the five Lagrangian points of two-body systems in space.

==Sun-Earth Lagrangian points

Contents

L1 is the Lagrangian point located approximately 1,500,000 km towards the Sun away from the Earth.

Present probes

Planned probes

Cancelled probes

L2

Present probes

Planned probes

Cancelled probes

L3

L4

L5

L4

L5

L4 and L5

L4

L5

L4

L5

L5

L5

L4

See also

References

==

L₁

L₁ is the Lagrangian point located approximately 1,500,000 km towards the Sun away from the Earth.

Past probes

★ International Cometary Explorer, formerly the International Sun-Earth Explorer 3 (ISEE-3), diverted out of L₁ in 1983 for a comet rendezvous mission. Currently in solar orbit, it may be captured in 2014 when it next approaches Earth.

★ NASA's Genesis probe collected solar wind samples at L1 from December 3, 2001 to April 1, 2004, when it returned to Earth.

★ WIND, a NASA spacecraft, was launched in November of 1994 in order to study solar wind. The spacecraft's original mission was to orbit the Sun at the L1 Lagrangian point, but this was changed when the SOHO spacecraft was sent to the same location.

Present probes

★ The Solar and Heliospheric Observatory (SOHO)

★ The Advanced Composition Explorer (ACE)

Planned probes

★ LISA Pathfinder

★ Kuafu

Cancelled probes

★ The Triana satellite, designed to monitor global warming

L₂

L₂ is the Lagrangian point located approximately 1,500,000 km away from the Earth in the direction opposite the Sun.

Present probes

★ Wilkinson Microwave Anisotropy Probe (WMAP)

Planned probes

★ The joint NASA, ESA and CSA James Webb Space Telescope (JWST), formerly known as the Next Generation Space Telescope (NGST)

★ The ESA Herschel Space Observatory

★ The ESA Planck Surveyor

★ The ESA Gaia probe

★ The NASA Terrestrial Planet Finder mission (may be placed in an Earth-trailing orbit instead)

★ The ESA Darwin mission

Cancelled probes

★ The ESA Eddington space telescope

L₃

L₃ is the Lagrangian point located on the side of the Sun opposite the Earth, slightly outside the Earth's orbit.

★ There are no known objects in this orbital location.

L₄

L₄ is the Lagrangian point located close to the Earth's orbit 60° ahead of the Earth.

★ Dust clouds

L₅

L₅ is the Lagrangian point located close to the Earth's orbit 60° behind the Earth.

★ Dust clouds
==Earth-Moon Lagrangian points==

L₂

★ future location of TDRS-derived satellites to facilitate direct communications between Earth and far side of the Moon.

L₄

★ possible Kordylewski clouds

L₅

★ possible Kordylewski clouds

L₄ and L₅

★ future location of TDRS-style communication satellites to support L₂ satellite
==Sun-Mars Lagrangian points==

Asteroids in the L₄ and L₅ Mars-Sun Lagrangian points are sometimes called ''Mars Trojan asteroids'', but "Trojan asteroid", as originally defined, is a term for asteroids in the L₄ and L₅ Jupiter-Sun Lagrangian points.

L₄

★

L₅

★ 5261 Eureka

★ , , , (not confirmed as true Lagrangian asteroids)
==Sun-Jupiter Lagrangian points==
Asteroids in the L₄ and L₅ Jupiter-Sun Lagrangian points are known as ''Jupiter Trojan asteroids'' or simply ''Trojan asteroids''.

L₄

★ Trojan asteroids, Greek camp

L₅

★ Trojan asteroids, Trojan camp
==Saturn-Tethys Lagrangian points==

L₄

★ Telesto

L₅

★ Calypso
==Saturn-Dione Lagrangian points==

L₄

★ Helene

L₅

★ Polydeuces
==Sun-Neptune Lagrangian points==

Asteroids in the L₄ and L₅ Neptune-Sun Lagrangian points are sometimes called ''Neptune Trojan asteroids'', but "Trojan asteroid", as originally defined, is a term for asteroids in the L₄ and L₅ Jupiter-Sun Lagrangian points.

L₄

★

★

★

★

★
Source: Minor Planet Center [1]

See also

★ Trojan points

★ Trojan asteroid

References

# John Baez' Lagrange Points page