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Ultraviolet Discoveries at Asteroid (21) Lutetia by the Rosetta Alice Ultraviolet Spectrograph

Scherrer, J. R.; Stern, S. A.; Feldman, P. D. +11 more

The NASA Alice ultraviolet (UV) imaging spectrograph on board the ESA Rosetta comet orbiter successfully conducted a series of flyby observations of the large asteroid (21) Lutetia in the days surrounding Rosetta's closest approach on 2010 July 10. Observations included a search for emission lines from gas, and spectral observations of the Lutetia…

Nongravitational Forces on Comets: An Extension of the Standard Model

Mysen, E.; Aksnes, K.

The accuracy of comet orbit computations is limited by uncertain knowledge of the recoil force due to outgassing from the nuclei. The standard model assumes an exponential dependence of the force on distance from the Sun. This variable force times constants A ₁, A ₂, and A ₃ represents the radial, transverse, and n…