MAN MADE OBJECTS ORBITING LAGRANGE POINTS

Non-exhaustive list of artificial objects that were sent to Lagrange points. Spacecraft orbiting these regions are in heliocentric orbit but are trapped in a Hill sphere: while their trajectory describes a circle around the Sun, they stay close to a celestial body as if they were in a high orbit, hence the need for a specific table.

Currently, there are solar observation probes orbiting the Sun-Earth system L1 Lagrange point (the closest to the Sun) and space telescopes at the L2 point (the furthest). Additionally, the Queqiao communications relay satellite is orbiting the Earth-Moon L2 point to support the Chang’e missions on the far side of our satellite.

11 artificial objects have been identified.

COSPAR IDname typemissionquantitymassstatusdate/epoch (UTC)
1994-071AWIND ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS)Solar probeWIND1active, Sun-Earth L1 Lagrange PointMay 15, 2004
1995-065ASOHO ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS)Solar probeSOHO1active, Sun-Earth L1 Lagrange PointMay 15, 1996
1997-045AACE (ADVANCED COMPOSITION EXPLORER)Solar probeACE (EXPLORER 71)1active, Sun-Earth L1 Lagrange PointDecember 12, 1997
2013-074AGAIA SPACE OBSERVATORYSpace telescopeGAIA1active, Sun-Earth L2 Lagrange PointJanuary 8, 2014
2014-065ADFH-3A BUS TEST VEHICULELunar orbital service moduleCHANG'E 5-T11EOM, defunct, Sun-Earth L2 Lagrange PointJanuary 23, 2015
2015-007ADSCOVR (TRIANA, GORESAT)Solar probeDEEP SPACE CLIMATE OBSERVATORY (DSCOVR)1active, Sun-Earth L1 Lagrange PointJune 8, 2015
2015-070ALISA PATHFINDERTechnology demonstratorLISA (SMART-2)1EOM, defunct, Sun-Earth L1 Lagrange PointJune 30, 2017
2018-045AQUEQIAOLunar orbiterQUEQIAO (CHANG'E 4 RELAY)1active, Earth-Moon L2 Lagrange PointJune 14, 2018
2019-040AeROSITA + ART-XC TELESCOPESScientific probeSPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG)1active, Sun-Earth L2 Lagrange PointJuly 13, 2019
2021-130AJAMES WEBB SPACE TELESCOPE (JWST)Space telescopeJAMES WEBB SPACE TELESCOPE (JWST)1active, Sun-Earth L2 Lagrange PointJanuary 24, 2022
2023-092AEUCLIDSpace telescopeEUCLID (DUNE, DARK UNIVERSE EXPLORER, SPACE, SPECTROSCOPIC ALL SKY COSMIC EXPLORER)1active, Sun-Earth L2 Lagrange PointJuly 1, 2023
2023-132AADITYA-L1Solar probeADITYA-L11active, Sun-Earth L1 Lagrange PointSeptember 2, 2023