An asteroidal companion to the Earth

  title={An asteroidal companion to the Earth},
  author={Paul A. Wiegert and Kimmo A. Innanen and Seppo Mikkola},
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 bases for space exploration or as mineral resources. Many near-Earth asteroids move on orbits crossing that of the Earth, but none has hitherto been identified as a dynamical companion to the Earth. Here we show that the orbit of asteroid 3753 (1986 TO), when viewed in the reference frame centred on… 
The Orbital Evolution of Near-Earth Asteroid 3753
Asteroid 3753 (1986 TO) is in a 1:1 mean motion resonance with Earth, on a complex horseshoe-type orbit. Numerical experiments are performed to determine its medium-term stability and the means by
A resonant family of dynamically cold small bodies in the near-Earth asteroid belt
Near-Earth objects (NEOs) moving in resonant, Earth-like orbits are potentially important. On the positive side, they are the ideal targets for robotic and human low-cost sample return missions and a
Asteroid and Comet Encounters with the Earth
While progressing in its orbit about the Sun, planet Earth encounters large numbers of small solar system bodies—asteroids, comets, and meteoroids. In the course of time, some of these small bodies
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
Asteroid 2002 VE68, a quasi-satellite of Venus
The asteroid 2002 VE68 is currently a quasi-satellite of Venus, the first object of this dynamical class to be discovered, and is also the first known co-orbital companion to Venus. Our computations
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
A survey of orbits of co-orbitals of Mars
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
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
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


The size distribution of the earth-approaching asteroids
The discovery circumstances of the first asteroids ever observed outside the earth's atmosphere but within the neighborhood of the earth-moon system are described. Four natural objects with diameters
Symplectic maps for the N-body problem.
The present study generalizes the mapping method of Wisdom (1982) to encompass all gravitational n-body problems with a dominant central mass. The rationale for the generalized mapping method is
Space motions of globular clusters NGC 362 and NGC 6218 (M12)
We measured the absolute proper motions of NGC 6218 (M12) against distant galaxies and of NGC 362 against stars of the Small Magellanic Cloud (typical accuracy ±0″.13 cent −1 ). The results are
Theory of Orbits.
Book on theory of orbits covering restricted problem of three bodies, two bodies in rotating coordinate system and periodic orbits