Pre-impact Albedo Map and Photometric Properties of the (65803) Didymos Asteroid Binary System from DART and Ground-based Data

B. J. Buratti; J. Pittichová; I. Mishra; J. K. Hillier; J. A. Mosher; S. R. Chesley; J. M. Sunshine; O. Barnouin; C. M. Ernst; R. T. Daly; J-Y Li; A. F. Cheng; A. S. Rivkin; J. Rizos

doi:10.3847/PSJ/ad2b60

The Planetary Science Journal (Jan 2024)

Pre-impact Albedo Map and Photometric Properties of the (65803) Didymos Asteroid Binary System from DART and Ground-based Data

B. J. Buratti,
J. Pittichová,
I. Mishra,
J. K. Hillier,
J. A. Mosher,
S. R. Chesley,
J. M. Sunshine,
O. Barnouin,
C. M. Ernst,
R. T. Daly,
J-Y Li,
A. F. Cheng,
A. S. Rivkin,
J. Rizos

Affiliations

B. J. Buratti: ORCiD; Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA
J. Pittichová: ORCiD; Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA
I. Mishra: ORCiD; Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA
J. K. Hillier: Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA; Grays Harbor College , Aberdeen, WA 98520, USA
J. A. Mosher: Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA
S. R. Chesley: ORCiD; Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109, USA
J. M. Sunshine: ORCiD; University of Maryland , College Park, MD 20742, USA
O. Barnouin: ORCiD; Johns Hopkins University , Applied Physics Laboratory, Laurel, MD 20723, USA
C. M. Ernst: ORCiD; Johns Hopkins University , Applied Physics Laboratory, Laurel, MD 20723, USA
R. T. Daly: ORCiD; Johns Hopkins University , Applied Physics Laboratory, Laurel, MD 20723, USA
J-Y Li: ORCiD; Planetary Science Institute , Tucson, AZ 85719, USA
A. F. Cheng: ORCiD; Johns Hopkins University , Applied Physics Laboratory, Laurel, MD 20723, USA
A. S. Rivkin: ORCiD; Johns Hopkins University , Applied Physics Laboratory, Laurel, MD 20723, USA
J. Rizos: University of Maryland , College Park, MD 20742, USA

DOI: https://doi.org/10.3847/PSJ/ad2b60
Journal volume & issue: Vol. 5, no. 3
p. 83

Abstract

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This study provides a pre-impact map of the albedo of the Double Asteroid Redirection Test (DART) target Dimorphos corrected for all the effects of viewing geometry, as well as an estimate of photometric roughness for the hemisphere imaged by DART. Other photometric properties are derived for the (65803) Didymos binary system based on DART and ground-based measurements obtained at JPL’s Table Mountain Observatory. The roughness, geometric albedo, phase curve and phase integral, and single particle phase function are typical of the S-family of asteroids. The major remaining uncertainty lies in the behavior of the phase curve below 7°. These results provide a baseline for comparison with Hera measurements, leading to an understanding of the quantitative effects of the kinetic impactor mitigation strategy.

Published in The Planetary Science Journal

ISSN: 2632-3338 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Astronomy
Website: https://iopscience.iop.org/journal/2632-3338

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