List of objects at Lagrangian points

This is a list of known objects which occupy, have occupied, or are planned to occupy any of the five Lagrangian points of two-body systems in space.

A diagram showing the five Lagrangian points in a two-body system

SunEarth Lagrangian points

L1

L1 is the Lagrangian point located approximately 1.5 million km from Earth towards the Sun.

Past probes

Present probes

Planned probes

L2

L2 is the Lagrangian point located approximately 1.5 million km from Earth in the direction opposite the Sun.

Past probes

Present probes

Planned probes

Cancelled probes

L3

L3 is the Sun–Earth Lagrangian point located on the side of the Sun opposite Earth, slightly outside the Earth's orbit.

L4

L4 is the Sun–Earth Lagrangian point located close to the Earth's orbit 60° ahead of Earth.

L5

L5 is the Sun–Earth Lagrangian point located close to the Earth's orbit 60° behind Earth.

Earth–Moon Lagrangian points

L2

L4 and L5

Past probes

Proposed objects

Sun–Mars Lagrangian points

Asteroids in the L4 and L5 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

Source: Minor Planet Center

Sun–Jupiter Lagrangian points

Asteroids in the L4 and L5 Sun–Jupiter Lagrangian points are known as Jupiter Trojan asteroids or simply Trojan asteroids.

L4

L5

SaturnTethys Lagrangian points

L4

L5

SaturnDione Lagrangian points

L4

L5

Sun–Uranus Lagrangian points

L4

Sun–Neptune Lagrangian points

Minor planets in the L4 and L5 Sun–Neptune Lagrangian points are called Neptune trojans, with a lower-case t, as "Trojan asteroid" was originally defined as a term for Lagrangian asteroids of Jupiter.

L4

L5

Source: Minor Planet Center

See also

Footnotes

This article is issued from Wikipedia - version of the Friday, March 04, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.