Bolometric albedos of Titan, Uranus, and Neptune

Computer Science

Scientific paper

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Albedo, Bolometers, Energy Budgets, Neptune (Planet), Titan, Uranus (Planet), Brightness Temperature, Iue, Radii, Random Errors, Ultraviolet Spectra, Planets, Uranus, Neptune, Saturn, Satellites, Titan, Bolometry, Flux, Albedo, Wavelengths, Spectra, Temperature, Calculations, Brightness, Luminosity, Thermal Effects, Infrared, Emissivity, Thermal Properties

Scientific paper

The energy budgets of Titan, Uranus, and Neptune are reevaluated using new observational data on energy input as well as unpublished data on energy output. The bolometric geometric albedo of each object was determined, and preliminary determinations of the phase functions were used to compute the Bond albedos and effective temperatures. The values for the latter are 83 + or - 2 K for Titan, 57 + or - 2 K for Uranus, and 47 + or - 2 K for Neptune. The effective temperature of Titan is greater than the observed brightness temperatures in the thermal infrared region of the spectrum, indicating that the emissivity is less than unity for this part of the spectrum. An internal luminosity of (3.9 + or 1.1) x 10 to the 15th W is found for Neptune, and an upper limit of (0.6 + or - 1.4) x 10 to the 15th W is found for Uranus.

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