Large coherent asteroid 2001 OE84

Details Large coherent asteroid 2001 OE84 Large coherent asteroid 2001 OE84

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..743p&link_type=abstract

In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed

Physics

2

Asteroids, Rotation, Spectra, Lightcurves

Scientific paper

Photometric and spectral observations of Amor asteroid 2001 OE84 made from October to December 2001 revealed that it rotated with a synodic period of 29.1909±0.0001 min, indicating that it is a body with non-zero global tensile strength. Its spectrum reveals an S-type. Its mean absolute magnitude is 18.31±0.16. Assuming geometric albedo pV of 0.18 typical for S-type asteroids, its mean diameter is 0.7 km. It is the single known asteroid with non-zero tensile strength in the size range D > 0.2 km. Its lightcurve is consistent with a principal-axis rotation that is expected with its estimated damping timescale of excited rotation on the order of 1 Myr which is shorter than its probable age. Its spectrum has an average slope and an average 1-micron absorption band for similarly sized NEAs, suggesting that the ability to retain regolith particles of sizes of order 1-micron and larger is not substantially affected by rotation at the rate found for 2001 OE84.

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