Mineralogical Variations within the S-Type Asteroid Class
Abstract A systematic spectral analysis has been Carried out on a large subset (39 of 144) of the S-type asteroid population. The S-asteroid class includes a number of distinct compositional subtypes…
Evidence for Ammonium-Bearing Minerals on Ceres
- T. King, R. Clark, W. Calvin, D. Sherman, R. H. Brown
- Physics, GeologyScience
- 1 March 1991
Spectra obtained from recent telescopic observation of 1-Ceres and laboratory measurements and theoretical calculations of three component mixtures of Ceres analog material suggest that an ammoniated…
A Redetermination of the Mass of Procyon
- T. Girard, H. Wu, D. Pourbaix
- Physics
- 1 May 2000
The parallax and astrometric orbit of Procyon have been redetermined from PDS measurements of over 250 photographic plates spanning 83 years, with roughly 600 exposures used in the solution. These…
Observations of Comet 19P/Borrelly by the Miniature Integrated Camera and Spectrometer Aboard Deep Space 1
- L. Soderblom, T. Becker, R. Yelle
- Physics, GeologyScience
- 4 April 2002
The nucleus of the Jupiter-family comet 19P/Borrelly was closely observed by the Miniature Integrated Camera and Spectrometer aboard the Deep Space 1 spacecraft on 22 September 2001, and Borrelly's coma exhibits two types of dust features: fans and highly collimated jets.
Voyager 2 at Neptune: Imaging Science Results
- B. Smith, L. Soderblom, J. Veverka
- Physics, Environmental ScienceScience
- 15 December 1989
Voyager 2 images of Neptune reveal a windy planet characterized by bright clouds of methane ice suspended in an exceptionally clear atmosphere above a lower deck of hydrogen sulfide or ammonia ices.…
The Cassini Visual And Infrared Mapping Spectrometer (Vims) Investigation
- R. H. Brown, K. Baines, C. Sotin
- Physics
- 1 November 2004
The Cassini visual and infrared mapping spectrometer (VIMS) investigation is a multidisciplinary study of the Saturnian system. Visual and near-infrared imaging spectroscopy and high-speed…
An observed correlation between plume activity and tidal stresses on Enceladus
- M. Hedman, C. Gosmeyer, M. Showalter
- GeologyNature
- 31 July 2013
It is reported that the plume’s horizontally integrated brightness is several times greater when Enceladus is near the point in its eccentric orbit where it is furthest from Saturn than it is when close to the point of closest approach to the planet.
Voyager 2 in the Uranian System: Imaging Science Results
- B. Smith, L. Soderblom, J. Veverka
- Physics, GeologyScience
- 4 July 1986
Voyager 2 images of the southern hemisphere of Uranus indicate that submicrometersize haze particles and particles of a methane condensation cloud produce faint patterns in the atmosphere, and Voyager images confirm the extremely low albedo of the ring particles.
The identification of liquid ethane in Titan’s Ontario Lacus
- R. H. Brown, L. Soderblom, P. Nicholson
- PhysicsNature
- 31 July 2008
Infrared spectroscopic data obtained by the Visual and Infrared Mapping Spectrometer (VIMS) on board the Cassini spacecraft strongly indicate that ethane, probably in liquid solution with methane, nitrogen and other low-molecular-mass hydrocarbons, is contained within Titan’s Ontario Lacus.
Triton's Geyser-Like Plumes: Discovery and Basic Characterization
- L. Soderblom, S. Kieffer, E. Shoemaker
- Environmental Science, PhysicsScience
- 19 October 1990
At least four active geyser-like eruptions were discovered in Voyager 2 images of Triton, Neptune's large satellite, during which on the order of a tenth of a cubic kilometer of ice is sublimed.
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