Sun-Earth Lagrange points

Non-exhaustive list of artificial objects that were sent to Sun-Earth Lagrange points. Spacecraft orbiting these regions are in heliocentric orbit but are trapped in the Earth’s Hill sphere: while their trajectory describes a circle around the Sun, they stay close to the Earth 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).

7 artificial objects have been identified. Spacecraft that are still in their systemic context, i.e. still operational, are highlighted in orange.

COSPAR IDnametypemissionquantitystatusdate/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
2015-007ADSCOVR (TRIANA, GORESAT)Solar probeDEEP SPACE CLIMATE OBSERVATORY (DSCOVR)1active, Sun-Earth L1 Lagrange PointJune 8, 2015
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