HR: 1340h
AN: P33C-0256    [Abstracts]
TI: Reflectance Spectra of Ammonia Ice
AU: * Smythe, W D
EM: wsmythe@lively.jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Nelson, R M
EM: robert.m.nelson@jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Boryta, M C
EM: mboryta@oca.net
AF: Mt. San Antonio College, 1100 N Grand Ave, Walnut, CA 91789 United States
AB: Ammonia has long been considered an important component in the formation and evolution of the outer planet satellites. For example, ammonia serves as a possible source for sustaining Titan's thick nitrogen-dominated atmosphere. Ammonia is seen in clouds in the atmospheres of Jupiter and Saturn, but has yet to be detected on any of the satellites. This may be because all forms of ammonia are unstable in the ambient conditions of the satellites surfaces or that its spectral features are altered by other components of the surface, and have not been identified. There is a limited amount of data available on the spectra of ammonia ice and mixtures containing ammonia at the pressure and temperature regimes of icy satellites. We present new spectra of ammonia ice over a range of temperatures and particle sizes.
DE: 5410 Composition (1060, 3672)
DE: 5422 Ices
DE: 5460 Physical properties of materials
DE: 5464 Remote sensing
SC: Planetary Sciences [P]
MN: Fall Meeting 2005