Modeling asteroid phase curves: laboratory study on bi-directional reflectance of meteorite powders

Astronomy and Astrophysics – Astronomy

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We performed a laboratory study on the bidirectional reflectance of meteorite particles of various particle sizes. The measurements were carried out using a goniometric photopolarimeter at Kobe University. The reflectance data were fitted with Hapke's model (Hapke 1993) to obtain model parameters. Based on these parameters, we calculated the absolute disk-integrated reflectance versus the phase angle, i.e., the photometric phase curve, for spherical bodies covered with the meteorite powders. We show that the model phase curves of the meteorite powder-surface have shallower slopes than those of asteroids.

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