# A brief visit from a red and extremely elongated interstellar asteroid

@article{Meech2017ABV,
title={A brief visit from a red and extremely elongated interstellar asteroid},
author={Karen J. Meech and Robert J. Weryk and Marco Micheli and Jan T. Kleyna and Olivier R. Hainaut and Robert Jedicke and Richard J. Wainscoat and K. C. Chambers and Jacqueline V. Keane and Andreea O. Petric and Larry Denneau and Eugene. A. Magnier and Travis A. Berger and Mark E. Huber and Heather Flewelling and C. Z. Waters and Eva Schunova-Lilly and S. Chastel},
journal={Nature},
year={2017},
volume={552},
pages={378-381}
}
• Published 20 November 2017
• Physics, Geology
• Nature
None of the approximately 750,000 known asteroids and comets in the Solar System is thought to have originated outside it, despite models of the formation of planetary systems suggesting that orbital migration of giant planets ejects a large fraction of the original planetesimals into interstellar space. The high predicted number density of icy interstellar objects (2.4 × 10−4 per cubic astronomical unit) suggests that some should have been detected, yet hitherto none has been seen. Many…
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## References

SHOWING 1-10 OF 29 REFERENCES
EVIDENCE FOR A DISTANT GIANT PLANET IN THE SOLAR SYSTEM
• Geology, Physics
• 2016
Recent analyses have shown that distant orbits within the scattered disk population of the Kuiper Belt exhibit an unexpected clustering in their respective arguments of perihelion. While several
Submillimetre images of dusty debris around nearby stars
• Physics, Geology
Nature
• 1998
Indirect detections of massive — presumably Jupiter-like — planets orbiting nearby Sun-like stars have recently been reported,. Rocky, Earth-like planets are much more difficult to detect, but clues
Inner solar system material discovered in the Oort cloud
• Physics, Geology
We derived 90% confidence limits (CL) on the interstellar number density ($\rho_{IS}^{CL}$) of interstellar objects (ISO; comets and asteroids) as a function of the slope of their size-frequency