L4 point and performed a survey for asteroids between 9 and 20 February 2017. Sun–Earth L5 is the Sun–Earth Lagrange point located close to the Earth's orbit 60° behind Earth. Asteroid , in a horseshoe companion orbit with Earth, is currently proximal to but at a high inclination. STEREO B (Solar TErrestrial RElations Observatory – Behind) made its closest pass to in October 2009, on its orbit around the Sun, slightly slower than Earth. The Spitzer Space Telescope is in an Earth-trailing heliocentric orbit drifting away c. 0.1 AU per year. In c. 2013–15 it has passed in its orbit. Hayabusa2 passed near during the spring of 2017, and imaged the surrounding area to search for Earth trojans on 18 April 2018. Proposed Vigil (ESA). One spacecraft in L5 and one in L1. Earth–Moon Lagrange points Earth–Moon L2 THEMIS Chang'e 5-T1 Queqiao relay satellite EQUULEUS nanosat. Earth–Moon L4 and L5 Kordylewski clouds Future location of TDRS-style communication satellites to support satellite and further regions on the Moon. Past probes Hiten was the first spacecraft to demonstrate a low energy trajectory, passing by and to achieve lunar orbit at a very low fuel expense, compared to usual orbital techniques. Hiten did not find any conclusive increase in dust density at Lagrange points. Proposed objects Exploration Gateway Platform In his 1976 book The High Frontier: Human Colonies in Space Dr. Gerard O'Neill proposed the establishment of gigantic Space Islands in . The inhabitants of the L5 Society should convert lunar material to huge solar power satellites. Many works of fiction, most notably the Gundam series, involve colonies at these locations. Sun–Venus Lagrange points L4 Sun–Mars Lagrange points Asteroids in the and Sun–Mars Lagrangian points are sometimes called Mars trojans, with a lower-case t, as "Trojan asteroid" was originally defined as a term for Lagrangian asteroids of Jupiter. They may also be called Mars Lagrangian asteroids. L4 L5 5261 Eureka , , (not confirmed as true Lagrangian asteroids) Source: Minor Planet Center Sun–Jupiter Lagrange points Asteroids in the and Sun–Jupiter Lagrangian points are known as Jupiter Trojan asteroids or simply Trojan asteroids. L4 Trojan asteroids, Greek camp L5 Trojan asteroids, Trojan camp Planned Lucy (spacecraft) Saturn–Tethys Lagrange points L4 Telesto L5 Calypso Saturn–Dione Lagrange points L4 Helene L5 Polydeuces, follows a "tadpole" orbit around L5 Sun–Uranus Lagrange points L3 83982 Crantor, follows a horseshoe orbit around L3 L4 Sun–Neptune Lagrange points Minor planets