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Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission
Dennis C. Reuter, S. Alan Stern, John Scherrer +17
The New Horizons instrument named Ralph is a visible/near infrared multi-spectral imager and a short wavelength infrared spectral imager. It is one of the core instruments on New H…
ALICE: The Ultraviolet Imaging Spectrograph aboard the New Horizons Pluto-Kuiper Belt Mission
S. Alan Stern, David C. Slater, John Scherrer +8
The New Horizons ALICE instrument is a lightweight (4.4 kg), low-power (4.4 Watt) imaging spectrograph aboard the New Horizons mission to Pluto/Charon and the Kuiper Belt. Its prim…
New Horizons: Anticipated Scientific Investigations at the Pluto System
Leslie A. Young, S. Alan Stern, Harold A. Weaver +24
The New Horizons spacecraft will achieve a wide range of measurement objectives at the Pluto system, including color and panchromatic maps, 1.25-2.50 micron spectral images for stu…
Distributions of H2O and CO2 ices on Ariel, Umbriel, Titania, and Oberon from IRTF/SpeX observations
W. M. Grundy, L. A. Young, J. R. Spencer +3
We present 0.8 to 2.4 micron spectral observations of uranian satellites, obtained at IRTF/SpeX on 17 nights during 2001-2005. The spectra reveal for the first time the presence of…
The Discovery of Two New Satellites of Pluto
H. A. Weaver, S. A. Stern, M. J. Mutchler +6
Pluto's first known moon, Charon, was discovered in 1978 (Christy 1978) and has a diameter about half that of Pluto (Buie 1992,Young 1994, Sicardy 2005), which makes it larger rela…
Characteristics and Origin of the Quadruple System at Pluto
S. A. Stern, H. A. Weaver, A. J. Steffl +6
Our discovery of two new satellites of Pluto, designated S/2005 P 1 and S/2005 P 2 (henceforth, P1 and P2), combined with the constraints on the absence of more distant satellites…