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Gaia Data Release 2
  • A. G. A. Brown, A. Vallenari, +450 authors T. Zwitter
  • Environmental Science, Physics
  • Astronomy & Astrophysics
  • 25 April 2018
Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighterExpand
Thermal inertia of near-Earth asteroids and implications for the magnitude of the Yarkovsky effect
Abstract Thermal inertia determines the temperature distribution over the surface of an asteroid and therefore governs the magnitude the Yarkovsky effect. The latter causes gradual drifting of theExpand
A three-parameter magnitude phase function for asteroids
Abstract We develop a three-parameter H, G1, G2 magnitude phase function for asteroids starting from the current two-parameter H, G phase function. We describe stochastic optimization of the basisExpand
Keck observations of near-Earth asteroids in the thermal infrared
We present the results of thermal-infrared observations of 20 near-Earth asteroids (NEAs) obtained in the period March 2000–February 2002 with the 10-m Keck-I telescope on Mauna Kea, Hawaii. TheExpand
Near-Earth asteroid (3200) Phaethon. Characterization of its orbit, spin state, and thermophysical parameters
Context. The near-Earth asteroid (3200) Phaethon is an intriguing object: its perihelion is at only 0.14 au and is associated with the Geminid meteor stream. Aims. We aim to use all availableExpand
Albedo and size determination of potentially hazardous asteroids: (99942) Apophis
Abstract The near-Earth object (99942) Apophis will make an extremely close approach to the Earth in 2029, and currently has approximately a one-in-45,000 chance of impacting our planet in 2036 (JPLExpand
Asteroid thermophysical modeling
The field of asteroid thermophysical modeling has experienced an extraordinary growth in the last ten years, as new thermal infrared data became available for hundreds of thousands of asteroids. TheExpand
Thermal inertia of main belt asteroids smaller than 100 km from IRAS data
Abstract Recent works have shown that the thermal inertia of km-sized near-Earth asteroids (NEAs) is more than 2 orders of magnitude higher than that of main belt asteroids (MBAs) with sizesExpand
Thermal fatigue as the origin of regolith on small asteroids
It is reported that thermal fatigue, a mechanism of rock weathering and fragmentation with no subsequent ejection, is the dominant process governing regolith generation on small asteroids and that thermal fragmentation induced by the diurnal temperature variations breaks up rocks larger than a few centimetres more quickly than do micrometeoroid impacts. Expand
Super-catastrophic disruption of asteroids at small perihelion distances
It is found that low-albedo asteroids are more likely to be destroyed farther from the Sun, which explains the apparent excess of high- albedo near-Earth objects and suggests thatLow-al Bedrock asteroids break up more easily as a result of thermal effects. Expand