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 ID | name | type | mission | quantity | mass (kg) | status | date/epoch (UTC) |
|---|---|---|---|---|---|---|---|
| 1994-071A | WIND ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS) | Solar probe | WIND | 1 | 950 | active, Sun-Earth L1 Lagrange Point | May 15, 2004 |
| 1995-065A | SOHO ISTP (INTERNATIONAL SOLAR TERRESTRIAL PHYSICS) | Solar probe | SOHO | 1 | 1614 | active, Sun-Earth L1 Lagrange Point | May 15, 1996 |
| 1997-045A | ACE (ADVANCED COMPOSITION EXPLORER) | Solar probe | ACE (EXPLORER 71) | 1 | 590 | active, Sun-Earth L1 Lagrange Point | December 12, 1997 |
| 2013-074A | GAIA SPACE OBSERVATORY | Space telescope | GAIA | 1 | 1573 | active, Sun-Earth L2 Lagrange Point | January 8, 2014 |
| 2015-007A | DSCOVR (TRIANA, GORESAT) | Solar probe | DEEP SPACE CLIMATE OBSERVATORY (DSCOVR) | 1 | 425 | active, Sun-Earth L1 Lagrange Point | June 8, 2015 |
| 2018-045A | QUEQIAO RELAY SATELLITE (CAST 100 BUS) | Lunar orbiter | QUEQIAO (QUEQIAO-1, CHANG'E RELAY SATELLITE) | 1 | 325 | active, Earth-Moon L2 Lagrange Point | June 14, 2018 |
| 2019-040A | SPEKTR-RG | Space telescope | SPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG) | 1 | 890 | active, Sun-Earth L2 Lagrange Point | July 13, 2019 |
| 2019-040A | eROSITA TELESCOPE | Scientific instrument | SPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG) | 1 | 810 | fixed to the probe | July 13, 2019 |
| 2019-040A | ART-XC TELESCOPE | Scientific instrument | SPEKTRUM-RONTGEN-GAMMA (SPEKTR-RG, SRG, SXG) | 1 | 350 | fixed to the probe | July 13, 2019 |
| 2021-130A | JAMES WEBB SPACE TELESCOPE (JWST) | Space telescope | JAMES WEBB SPACE TELESCOPE (JWST) | 1 | 5739 | active, Sun-Earth L2 Lagrange Point | January 24, 2022 |
| 2023-092A | EUCLID | Space telescope | EUCLID (DUNE, DARK UNIVERSE EXPLORER, SPACE, SPECTROSCOPIC ALL SKY COSMIC EXPLORER) | 1 | 1900 | active, Sun-Earth L2 Lagrange Point | July 1, 2023 |
| 2023-132A | ADITYA-L1 | Solar probe | ADITYA-L1 | 1 | 1200 | active, Sun-Earth L1 Lagrange Point | September 2, 2023 |