Earth’s Trojan asteroid

  title={Earth’s Trojan asteroid},
  author={Martin G. Connors and Paul A. Wiegert and Christian Veillet},
It was realized in 1772 that small bodies can stably share the same orbit as a planet if they remain near ‘triangular points’ 60° ahead of or behind it in the orbit. Such ‘Trojan asteroids’ have been found co-orbiting with Jupiter, Mars and Neptune. They have not hitherto been found associated with Earth, where the viewing geometry poses difficulties for their detection, although other kinds of co-orbital asteroid (horseshoe orbiters and quasi-satellites) have been observed. Here we report an… 
The Second Earth Trojan 2020 XL5
The Earth Trojans are coorbitals librating around the Lagrange points L 4 or L 5 of the Sun–Earth system. Although many numerical studies suggest that they can maintain their dynamical status and be
An optimal Earth Trojan asteroid search strategy
Trojan asteroids are minor planets that share the orbit of a planet about the Sun and librate around the L4 or L5 Lagrangian points of stability. They are important solar-system fossils because they
The gas giants Jupiter and Neptune are known to host Trojans, and also Mars has co-orbiting asteroids. Recently, in an extensive numerical investigation ([8]) the possibility of captures of asteroids
From horseshoe to quasi-satellite and back again: the curious dynamics of Earth co-orbital asteroid 2015 SO2
Earth co-orbitals of the horseshoe type are interesting objects to study for practical reasons. They are relatively easy to access from our planet and that makes them attractive targets for sample
Transient Terrestrial Trojans: Comparative Short-term Dynamical Evolution of 2010 TK7 and 2020 XL5
The Trojan asteroids of Mars and Jupiter are long-term stable, those of Earth are expected to be just transient companions. The first Trojan of our planet, 2010 TK7, was discovered in 2010 and its
The orbit of 2010 TK7: possible regions of stability for other Earth Trojan asteroids
The first Earth Trojan has been observed and found to be on an interesting orbit close to the Lagrange point L4. In the present study, we therefore perform a detailed investigation of the stability
A Kozai-resonating Earth quasi-satellite
The recently discovered asteroid 2013 LX 28 is in 1:1 resonance with Earth, but has large eccentricity and inclination. These lead to unusual dynamics in which the Kozai resonance plays a large role
A Collision Mechanism for the Removal of Earth's Trojan Asteroids
Due to their strong resonances with their host planet, Trojan asteroids can remain in stable orbits for billions of years. As a result, they are powerful probes for constraining the dynamical and


Earth Trojan Asteroids: A Study in Support of Observational Searches
Abstract Observational searches for asteroids orbiting near Earth's triangular Lagrange points face unique obstacles. A population of such asteroids would occupy a large projected area on the sky
Discovery of Earth's quasi‐satellite
Abstract— The newly discovered asteroid 2003 YN107 is currently a quasi‐satellite of the Earth, making a satellite‐like orbit of high inclination with apparent period of one year. The term
An asteroidal companion to the Earth
Near-Earth asteroids range in size from a few metres to more than 30 km: in addition to playing an important role in past and present impact rates on the Earth, they might one day be exploited as
Discovery of an asteroid and quasi‐satellite in an Earth‐like horseshoe orbit
Abstract— The newly discovered asteroid 2002 AA29 moves in a very Earth‐like orbit that relative to Earth has a unique horseshoe shape and allows transitions to a quasi‐satellite state. This is the
A long-lived horseshoe companion to the Earth
We present a dynamical investigation of a newly found asteroid, 2010 SO 16, and the discovery that it is a horseshoe companion of the Earth. The object's absolute magnitude (H = 20.7) makes this the
Transient co-orbital asteroids
A CCD Search for Lagrangian Asteroids of the Earth–Sun System
Abstract The L4 and L5 points of the Earth–Sun system were imaged using the University of Hawaii 2.24-m telescope on 1994 May 5–7 and July 6–8 UT. We used a thinned Tektronix 2048 × 2048 CCD,
Thersites: a `jumping' Trojan?
In this paper, we examine the dynamical evolution of the asteroid (1868) Thersites 1, a member of the Trojan belt. Thersites is librating around the Lagrangian point L4, following, however, a chaotic