Volume 580, August 2015
|Number of page(s)||10|
|Section||Planets and planetary systems|
|Published online||07 August 2015|
Shape and solar phase angle effects on the taxonomic classification of asteroids
Observatório Nacional, rua Gal. José Cristino 77, São Cristóvão, 20921-400 Rio de Janeiro, Brazil
Received: 7 April 2015
Accepted: 29 May 2015
Context. The taxonomic classification of SDSS observations of asteroids show a dependency on the phase angle of the observations.
Aims. We aim to quantify this dependence and use Hapke models to investigate its cause.
Methods. Statistical methods were used to characterize the taxonomic variation with phase angle. The effect of several Hapke parameters on the spectral slope and band depth of synthetic spectra for a slab and for ellipsoids with different oblatenesses were then analyzed.
Results. Effects linked to body shape and the solar phase function and macroscopic roughness can alter key spectral parameters that are related to the taxonomic classification depending on the solar phase angle, rotational phase of the observation, and shape of the asteroid. Depending on the oblateness of the body, shape effects are similar to phase effects.
Key words: minor planets, asteroids: general / methods: statistical / methods: analytical
© ESO, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.