Physical characterization of double asteroid (3905) Doppler

Observations of the synchronous double asteroid (3905) Doppler were carried out during a campaign of 3 months between October 2017 and December 2017. Several eclipse events of 0.2–0.3 mag were recorded. We refined the rotational period to 50.826 ± 0.002 h. The J2000 ecliptic coordinates of the pole...

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Published in:Icarus (New York, N.Y. 1962) Vol. 345; p. 113726
Main Authors: Descamps, P., Vachier, F., Berthier, J., Normand, J., Wiggins, P., de Groot, H., Coudert, J., Chojnacki, V., Labrevoir, O., Joly, S., Marcon, J.-P., Olimpiade, S., Dargoui-Pister, B., Delhaume, C., Duval, T., El Farissi, Y., Giraud, M., Grieco, V., Kaderi, S., Laidi, A., Lauze, T., Mary, H., Medour, M., Negre, F., Passabet, K., Perret, A., Peyron, M., Ramos, N., Soridi, M.
Format: Journal Article
Language:English
Published: Elsevier Inc 15-07-2020
Elsevier
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Summary:Observations of the synchronous double asteroid (3905) Doppler were carried out during a campaign of 3 months between October 2017 and December 2017. Several eclipse events of 0.2–0.3 mag were recorded. We refined the rotational period to 50.826 ± 0.002 h. The J2000 ecliptic coordinates of the pole of the system are: λ = 215 ± 2° and β = 65 ± 2°. The observed light curves have been reproduced synthetically by modeling each member of the system as an elongated ellipsoid, separated from each other by a distance equivalent to 5 times the sum of the two diameters. Assuming an identical internal composition of each component, we derived a bulk density of 3.8 ± 0.2 g/cm3. Such a high density is typical of M-type asteroids.
ISSN:0019-1035
1090-2643
DOI:10.1016/j.icarus.2020.113726