Status Report

Asteroid Models from Multiple Data Sources

By SpaceRef Editor
February 25, 2015
Filed under , ,

J. Durech, B. Carry, M. Delbo, M. Kaasalainen, M. Viikinkoski

(Submitted on 17 Feb 2015)

In the past decade, hundreds of asteroid shape models have been derived using the lightcurve inversion method. At the same time, a new framework of 3-D shape modeling based on the combined analysis of widely different data sources such as optical lightcurves, disk-resolved images, stellar occultation timings, mid-infrared thermal radiometry, optical interferometry, and radar delay-Doppler data, has been developed. This multi-data approach allows the determination of most of the physical and surface properties of asteroids in a single, coherent inversion, with spectacular results. We review the main results of asteroid lightcurve inversion and also recent advances in multi-data modeling. We show that models based on remote sensing data were confirmed by spacecraft encounters with asteroids, and we discuss how the multiplication of highly detailed 3-D models will help to refine our general knowledge of the asteroid population. The physical and surface properties of asteroids, i.e., their spin, 3-D shape, density, thermal inertia, surface roughness, are among the least known of all asteroid properties. Apart for the albedo and diameter, we have access to the whole picture for only a few hundreds of asteroids. These quantities are nevertheless very important to understand as they affect the non-gravitational Yarkovsky effect responsible for meteorite delivery to Earth, or the bulk composition and internal structure of asteroids.

Comments: chapter that will appear in a Space Science Series book Asteroids IV

Subjects: Earth and Planetary Astrophysics (astro-ph.EP)

Cite as: arXiv:1502.04816 [astro-ph.EP] (or arXiv:1502.04816v1 [astro-ph.EP] for this version)

Submission history

From: Josef urech 

[v1] Tue, 17 Feb 2015 07:25:41 GMT (1305kb)

SpaceRef staff editor.