Adaptive optics study of Asteroid 4 Vesta
Explore the source record for details and available documents.
adaptive optics asteroid spectroscopy surface comp↗
Engineering topics
Hainaut, O.
Publications and source records attributed to Hainaut, O..
High-resolution imaging of the Pluto-Charon system with the Faint Object Camera of the Hubble Space Telescope
Images of the Pluto-Charon system were obtained with the Faint Object Camera (FOC) of the Hubble Space Telescope (HST) after the refurbishment of the telescope. The images are of superb quality, allowing the determination of radii, fluxes, and albedos. Attempts were made to improve the resolution of the already diffraction limited images by image restoration. These yielded indications of surface albedo distributions qualitatively consistent with models derived from observations of Pluto-Charon mutual eclipses.
Albrecht, R.↗
Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU
The properties and evolution of the major outburst experienced by Comet Halley at 14 AU during February-March 1991 are studied. It is found that the observed halo is a segment of a conical surface populated by solid particles ejected from a localized, temporarily activated region on the sunlit hemisphere of the spinning nucleus. The total mass of the ejecta was at least 10 exp 12 g and CO was probably the prime driver, accelerating the smallest grains to a terminal velocity of about 45 m/s. The mass loading of the gas flow by particulate matter is enormous, with the mass production rate exceeding the expected production rate of CO by a factor of several tens.
Sekanina, Z.↗