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Start Over Author "Cruikshank, Dale P." Journal geophysical research letters
6 results on '"Cruikshank, Dale P."'

1. Great Expectations: Plans and Predictions for New Horizons Encounter With Kuiper Belt Object 2014 MU69 (“Ultima Thule”)

Author

Moore, Jeffrey M., primary, McKinnon, William B., additional, Cruikshank, Dale P., additional, Gladstone, G. Randall, additional, Spencer, John R., additional, Stern, S. Alan, additional, Weaver, Harold A., additional, Singer, Kelsi N., additional, Showalter, Mark R., additional, Grundy, William M., additional, Beyer, Ross A., additional, White, Oliver L., additional, Binzel, Richard P., additional, Buie, Marc W., additional, Buratti, Bonnie J., additional, Cheng, Andrew F., additional, Howett, Carly, additional, Olkin, Cathy B., additional, Parker, Alex H., additional, Porter, Simon B., additional, Schenk, Paul M., additional, Throop, Henry B., additional, Verbiscer, Anne J., additional, Young, Leslie A., additional, Benecchi, Susan D., additional, Bray, Veronica J., additional, Chavez, Carrie L., additional, Dhingra, Rajani D., additional, Howard, Alan D., additional, Lauer, Tod R., additional, Lisse, C. M., additional, Robbins, Stuart J., additional, Runyon, Kirby D., additional, and Umurhan, Orkan M., additional

Published
2018
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2. Great Expectations: Plans and Predictions for New Horizons Encounter With Kuiper Belt Object 2014 MU69 (“Ultima Thule”).

Author

Moore, Jeffrey M., McKinnon, William B., Cruikshank, Dale P., Gladstone, G. Randall, Spencer, John R., Stern, S. Alan, Weaver, Harold A., Singer, Kelsi N., Showalter, Mark R., Grundy, William M., Beyer, Ross A., White, Oliver L., Binzel, Richard P., Buie, Marc W., Buratti, Bonnie J., Cheng, Andrew F., Howett, Carly, Olkin, Cathy B., Parker, Alex H., and Porter, Simon B.

Subjects
KUIPER belt, SPACE flight, SPACE environment, GEOPHYSICAL observations
Abstract

Abstract: The New Horizons encounter with the cold classical Kuiper Belt object 2014 MU69 (informally named “Ultima Thule,” hereafter Ultima) on 1 January 2019 will be the first time a spacecraft has ever closely observed one of the free‐orbiting small denizens of the Kuiper Belt. Related to but not thought to have formed in the same region of the solar system as the comets that been explored so far, it will also be the most distant, and most primitive body yet visited by spacecraft. In this letter we begin with a brief overview of cold classical Kuiper Belt objects, of which Ultima is a prime example. We give a short preview of our encounter plans. We note what is currently known about Ultima from Earth‐based observations. We then review our expectations and capabilities to evaluate Ultima's composition, surface geology, structure, near space environment, small moons, rings, and the search for activity. [ABSTRACT FROM AUTHOR]

Published
2018
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3. Great Expectations: Plans and Predictions for New Horizons Encounter With Kuiper Belt Object 2014 MU69(“Ultima Thule”)

Author

Moore, Jeffrey M., McKinnon, William B., Cruikshank, Dale P., Gladstone, G. Randall, Spencer, John R., Stern, S. Alan, Weaver, Harold A., Singer, Kelsi N., Showalter, Mark R., Grundy, William M., Beyer, Ross A., White, Oliver L., Binzel, Richard P., Buie, Marc W., Buratti, Bonnie J., Cheng, Andrew F., Howett, Carly, Olkin, Cathy B., Parker, Alex H., Porter, Simon B., Schenk, Paul M., Throop, Henry B., Verbiscer, Anne J., Young, Leslie A., Benecchi, Susan D., Bray, Veronica J., Chavez, Carrie L., Dhingra, Rajani D., Howard, Alan D., Lauer, Tod R., Lisse, C. M., Robbins, Stuart J., Runyon, Kirby D., and Umurhan, Orkan M.

Abstract

The New Horizonsencounter with the cold classical Kuiper Belt object 2014 MU69(informally named “Ultima Thule,” hereafter Ultima) on 1 January 2019 will be the first time a spacecraft has ever closely observed one of the free‐orbiting small denizens of the Kuiper Belt. Related to but not thought to have formed in the same region of the solar system as the comets that been explored so far, it will also be the most distant, and most primitive body yet visited by spacecraft. In this letter we begin with a brief overview of cold classical Kuiper Belt objects, of which Ultima is a prime example. We give a short preview of our encounter plans. We note what is currently known about Ultima from Earth‐based observations. We then review our expectations and capabilities to evaluate Ultima's composition, surface geology, structure, near space environment, small moons, rings, and the search for activity. The letter discusses the current state‐of‐knowledge for the cold classical Kuiper Belt object 2014 MU69, the target of a close encounter by NASA's New Horizon spacecraft on 1 January 2019. We also review our encounter plans and make broad speculative predictions as to might be revealed by our observations. New Horizons will fly to within 3,500 km of 2014 MU69(informally named “Ultima Thule”), acquiring images with pixel scale resolutions significantly better than 100 m/pixel). We plan to obtain topography derived from stereo imaging and body shape. Our spectroscopic observations potentially could detect H2O, CH4, N2, CH3OH, and NH3, depending on their brightness and abundance on the surface. We will also search for evidence of outgassing, small moons, and rings. This exploration will transform Kuiper Belt and Kuiper Belt object science from a purely astronomical regime, to a geological and geophysical regime, which radically changed paradigms when the same happened to asteroids and comets in past decades. New Horizons will fly to within 3,500 km of 2014 MU69, acquiring images with pixel scale resolutions significantly better than 100 m/pixelOur spectroscopic observations potentially could detect H2O, CH4, N2, CH3OH, and NH3, depending on their brightness and abundanceWe will evaluate Ultima's composition, surface geology, structure, near space environment, and the search for small moons, rings, and activity

Published
2018
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4. Photometric changes on Saturn's Titan: Evidence for active cryovolcanism

Author

Nelson, Robert M., primary, Kamp, Lucas W., additional, Lopes, Rosaly M. C., additional, Matson, Dennis L., additional, Kirk, Randolph L., additional, Hapke, Bruce W., additional, Wall, Stephen D., additional, Boryta, Mark D., additional, Leader, Frank E., additional, Smythe, William D., additional, Mitchell, Karl L., additional, Baines, Kevin H., additional, Jaumann, Ralf, additional, Sotin, Christophe, additional, Clark, Roger N., additional, Cruikshank, Dale P., additional, Drossart, Pierre, additional, Lunine, Jonathan I., additional, Combes, Michel, additional, Bellucci, Giancarlo, additional, Bibring, Jean-Pierre, additional, Capaccioni, Fabrizio, additional, Cerroni, Pricilla, additional, Coradini, Angioletta, additional, Formisano, Vittorio, additional, Filacchione, Gianrico, additional, Langevin, Yves, additional, McCord, Thomas B., additional, Mennella, Vito, additional, Nicholson, Phillip D., additional, Sicardy, Bruno, additional, Irwin, Patrick G. J., additional, and Pearl, John C., additional

Published
2009
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5. Grain metamorphism in polar nitrogen ice on Triton

Author

Zent, Aaron P, Mckay, Christopher P, Pollack, James B, and Cruikshank, Dale P

Subjects
Lunar And Planetary Exploration
Abstract

The rate of nitrogen grain growth on putative N2-rich polar caps on Triton is calculated. For most plausible assumptions of independent variables, mean grain sizes in polar N2 are meter-scale. Triton's polar caps should constitute the definitive solar-system test bed for the process of ice grain metamorphism. Interpretation of data already in hand may require long path length through condensed N2, possibly due to grain growth. Upcoming Voyager data may clarify the situation, although possible complications in detecting a glaze of N2 ice exist.

Published
1989

6. The thermal structure of Triton's atmosphere - Pre-Voyager models

Author

Mckay, Christopher P, Pollack, James B, Zent, Aaron P, Cruikshank, Dale P, and Courtin, Regis

Subjects
Lunar And Planetary Exploration
Abstract

Spectral data from earth observations have indicated the presence of N2 and CH4 on Triton. This paper outlines the use of the 1-D radiative-convective model developed for Titan to calculate the current pressure of N2 and CH4 on Triton. The production of haze material is obtained by scaling down from the Titan value. Results and predictions for the Voyager Triton encounter are as follows: A N2-CH4 atmosphere on Triton is thermodynamically self consistent and would have a surface pressure of approximately 50 millibar; due to the chemically produced haze, Triton has a hot atmosphere with a temperature of approximately 130 K; Triton's troposphere is a region of saturation of the major constituent of the atmosphere, N2.

Published
1989

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