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.

Estimated number of artificial objects: 10
Estimated total mass: 16.4 tons

COSPAR IDname typemissionquantitymass (kg)statusdate/epoch (UTC)
1994-071AWIND ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS)Solar probeWIND1950active, Sun-Earth L1 Lagrange PointMay 15, 2004
1995-065ASOHO ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS)Solar probeSOHO11614active, Sun-Earth L1 Lagrange PointMay 15, 1996
1997-045AACE (ADVANCED COMPOSITION EXPLORER)Solar probeACE (EXPLORER 71)1590active, Sun-Earth L1 Lagrange PointDecember 12, 1997
2013-074AGAIA SPACE OBSERVATORYSpace telescopeGAIA11573active, Sun-Earth L2 Lagrange PointJanuary 8, 2014
2015-007ADSCOVR (TRIANA, GORESAT)Solar probeDEEP SPACE CLIMATE OBSERVATORY (DSCOVR)1425active, Sun-Earth L1 Lagrange PointJune 8, 2015
2018-045AQUEQIAO RELAY SATELLITE (CAST 100 BUS)Lunar orbiterQUEQIAO (QUEQIAO-1, CHANG'E RELAY SATELLITE)1325active, Earth-Moon L2 Lagrange PointJune 14, 2018
2019-040ASPEKTR-RGSpace telescopeSPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG)1890active, Sun-Earth L2 Lagrange PointJuly 13, 2019
2019-040AeROSITA TELESCOPEScientific instrumentSPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG)1810fixed to the probeJuly 13, 2019
2019-040AART-XC TELESCOPEScientific instrumentSPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG)1350fixed to the probeJuly 13, 2019
2021-130AJAMES WEBB SPACE TELESCOPE (JWST)Space telescopeJAMES WEBB SPACE TELESCOPE (JWST)15739active, Sun-Earth L2 Lagrange PointJanuary 24, 2022
2023-092AEUCLIDSpace telescopeEUCLID (DUNE, DARK UNIVERSE EXPLORER, SPACE, SPECTROSCOPIC ALL SKY COSMIC EXPLORER)11900active, Sun-Earth L2 Lagrange PointJuly 1, 2023
2023-132AADITYA-L1Solar probeADITYA-L111200active, Sun-Earth L1 Lagrange PointSeptember 2, 2023