Results 21 to 30 of about 280 (159)

Are NH3 and CO2 Ice Present on Miranda?

The Planetary Science Journal, 2023
Published near-IR spectra of the four largest classical Uranian satellites display the presence of discrete deposits of CO _2 ice, along with subtle absorption features around 2.2 μ m.
Riley A. DeColibus, Nancy J. Chanover, Richard J. Cartwright   +2 more
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Dynamical Interactions and Mass Loss within the Uranian System

The Planetary Science Journal, 2023
The origin and evolution of planetary rings and moons remains an active area of study, particularly as they relate to the impact history and volatile inventory of the outer solar system.
Stephen R. Kane, Zhexing Li
doaj   +1 more source

Evidence for Nitrogen-bearing Species on Umbriel: Sourced from a Subsurface Ocean, Undifferentiated Crust, or Impactors?

The Planetary Science Journal, 2023
Near-infrared spectra of Umbriel and the other classical Uranian moons exhibit 2.2 μ m absorption bands that could result from ammonia (NH _3 ) bearing species, possibly exposed in the geologically recent past.
Richard J. Cartwright, Riley A. DeColibus, Julie C. Castillo-Rogez, Chloe B. Beddingfield, William M. Grundy, Tom A. Nordheim   +5 more
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A CO2 Cycle on Ariel? Radiolytic Production and Migration to Low-latitude Cold Traps

The Planetary Science Journal, 2022
CO _2 ice is present on the trailing hemisphere of Ariel but is mostly absent from its leading hemisphere. The leading/trailing hemispherical asymmetry in the distribution of CO _2 ice is consistent with radiolytic production of CO _2 , formed by charged
Richard J. Cartwright, Tom A. Nordheim, Riley A. DeColibus, William M. Grundy, Bryan J. Holler, Chloe B. Beddingfield, Michael M. Sori, Michael P. Lucas, Catherine M. Elder, Leonardo H. Regoli, Dale P. Cruikshank, Joshua P. Emery, Erin J. Leonard, Corey J. Cochrane   +13 more
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Photometry of the Uranian Satellites with Keck and the Search for Mab [PDF]

The Astronomical Journal, 2019
Abstract We present photometric properties of six small (radii <100 km) satellites of Uranus based on 32 H-band (1.49–1.78μm) images taken on 2015 August 29 from the Keck II Telescope on Maunakea, Hawaii with the near-infrared camera NIRC2 coupled to the adaptive optics system.
Samuel Paradis, Chris Moeckel, Joshua Tollefson, Imke de Pater   +3 more
openaire   +2 more sources

A ring system detected around the Centaur (10199) Chariklo [PDF]

, 2014
Hitherto, rings have been found exclusively around the four giant planets in the Solar System1. Rings are natural laboratories in which to study dynamical processes analogous to those that take place during the formation of planetary systems and galaxies.
Vanzi, L., Frank, N.R., Spagnotto, Julio, H. Monteiro, Harpsøe, Kennet Bomann West, J. Lecacheux, M. Emilio, Braga-Ribas, Felipe, F. Roques, M. Gillon, E. Jehin, Vanzi, Leonardo, Machado, D. I., Roques, Françoise, Lellouch, Emmanuel, Vachier, Frédéric, R. Sfair, Almenares, L., Colazo, C., Colas, F., D. G. Lambas, Jørgensen, U., Jehin, E., Lemos, Pablo, J. L. Ortiz, J. B. Haislip, J. P. Moore, Gil Hutton, Ricardo Alfredo, Wang, X.-b., Gil-Hutton, Ricardo, Ivarsen, Kevin, Opitom, C., R. Melia, Ortiz, J. L., Moore, J., A. Ceretta, Harpsoe, K., Schneiter, E. M., Lambas, Diego García, Lacluyze, A.P., Braga-Ribas, F., Lorenzini, L., Schneiter, E.M., B. Sicardy, Gu, S.-h., L. Almenares, Melia, R., L. Maquet, Reichart, Daniel E., LaCluyze, A. P., Haislip, J. B., Ivarsen, K. M., L. Vanzi, Benedetti-Rossi, G., R. G. Sandness, Haislip, J.B., Garcia Lambas, Diego Rodolfo, G. Tancredi, Perez, V., J. Spagnotto, Sicardy, Bruno, Wang, Xiaobin, Martinez, N., Colas, François, P. Kervella, P. Lemos, Benedetti-Rossi, Gustavo, C. Colazo, Gil-Hutton, R., LaCluyze, A., Tancredi, G., Frank, N. R., Gu, S. -H., Snodgrass, Colin, Maury, A., Gillon, Michaël, Gomes, A. Ramos, Manfroid, Jean, MacHado, D.I., Gomes Jr., A., F. Char, Widemann, Thomas, Ceretta, Alberto, Maury, A. J., M. Dominik, Schneiter, E., Tancredi, Gonzalo, Char, F., Opitom, Cyrielle, Gillon, M., Brage-Ribas, F., Roland, S., Lacluyze, Aaron P., Moutamid, M. El, Lambas, D., Roques, F., Ceretta, A., Manfroid, J., Ligier, N., Lecacheux, J., V. Perez, Monteiro, H., Lambas, D. G., S. Roland, U. G. Jørgensen, El Moutamid, Maryame, Harpsøe, Kennet, Machado, D., J. Pollock, Leiva, R., R. Gil-Hutton, Colazo, Carlos, Benedetti Rossi, G., Mehret, Leandro Cesar, Braga Ribas, F., Frank, Nathan R., El Moutamid, M., Assafin, Marcelo, A. Ramos Gomes, Emilio, M., Gu, S., Jorgensen, U. G., Gu, Shenghong, N. Ligier, M. Rabus, Camargo, Julio, L. Lorenzini, Rabus, Markus, Skottfelt, Jesper Mirsa, Camargo, J. I. B., Sicardy, B., Skottfelt, J., Vieira-Martins, R., Lemos, P., Moore, Justin, Char, Farid, Moore, J.P., Rabus, M., Roig, F., Ivarsen, K., Vachier, F., Sandness, R. G., Wang, X. -B., Camargo, J., K. M. Ivarsen, Haislip, Joshua, Skottfelt, Jesper, Assafin, M., Lellouch, E., Vierira-Martins, R., Sandness, R.G., Vieira Martins, R., Ivarsen, K.M., Reichart, D.E., D. I. Machado, Gomes, A. R., J. Manfroid, Camargo, J., I B, Sfair, R. [UNESP], E. Lellouch, Frank, N., N. Morales, Reichart, D., F. Colas, Ortiz, J.L., X.-b. Wang, C. Opitom, S.-h. Gu, F. Braga-Ribas, Emilio, Marcelo, N. R. Frank, K. Harpsøe, Roland, Santiago, Vieira-Martins, Roberto, J. Skottfelt, Harpsøe, K., Jorgensen, U., N. Martinez, Moore, J. P., Ligier, Nicolas, J. I. B. Camargo, Pollock, J., Camargo, J.I.B., Reichart, D. E., Melia, Raul Roberto, Lecacheux, Jean, Jørgensen, Uffe Gråe, C. Snodgrass, Jørgensen, U.G., G. Benedetti-Rossi, Haislip, J., M. El Moutamid, Camargo, J.,, Sfair, R., Maquet, L., Sfair, Rafael, Mehret, L., Duffard, R., Jørgensen, U. G., Dominik, M., Duffard, R,, Kervella, Patrick, Dominik, Martin, R. Vieira-Martins, Snodgrass, C., Spagnotto, J., Widemann, T., Duffard, René, A. P. LaCluyze, Pollock, Joseph, E. M. Schneiter, Maquet, Lucie, Sandness, R., Morales, N., Kervella, P., Wang, X., L. Mehret, A. Maury, Ramos Gomes, A., F. Vachier, Jehin, Emmanuel, T. Widemann, R. Duffard, Schneiter, E. Matías, F. Roig, R. Leiva, M. Assafin, Ortiz, J., D. E. Reichart   +228 more
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The Case for a New Frontiers–Class Uranus Orbiter: System Science at an Underexplored and Unique World with a Mid-scale Mission

The Planetary Science Journal, 2022
Current knowledge of the Uranian system is limited to observations from the flyby of Voyager 2 and limited remote observations. However, Uranus remains a highly compelling scientific target due to the unique properties of many aspects of the planet ...
Ian J. Cohen, Chloe Beddingfield, Robert Chancia, Gina DiBraccio, Matthew Hedman, Shannon MacKenzie, Barry Mauk, Kunio M. Sayanagi, Krista M. Soderlund, Elizabeth Turtle, Caitlin Ahrens, Christopher S. Arridge, Shawn M. Brooks, Emma Bunce, Sebastien Charnoz, Athena Coustenis, Robert A. Dillman, Soumyo Dutta, Leigh N. Fletcher, Rebecca Harbison, Ravit Helled, Richard Holme, Lauren Jozwiak, Yasumasa Kasaba, Peter Kollmann, Statia Luszcz-Cook, Kathleen Mandt, Olivier Mousis, Alessandro Mura, Go Murakami, Marzia Parisi, Abigail Rymer, Sabine Stanley, Katrin Stephan, Ronald J. Vervack, Jr., Michael H. Wong, Peter Wurz   +36 more
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Feasibility of a Galileo-Style Tour of the Uranian Satellites [PDF]

Journal of Spacecraft and Rockets, 2003
Gravity-assist trajectories have been a key to outer solar system exploration. In particular, the gravity-assist tour of the Jovian satellites has contributed significantly to the success of the Galileo mission. A comparison of the Jovian system to the Uranian system reveals that the two possess similar satellite/planet mass ratios. Tisserand graphs of
Andrew F. Heaton, James M. Longuski
openaire   +1 more source

CCD photometry of the Uranian satellites

The Astronomical Journal, 1992
Broadband V and R CCD observations of the Uranian satellite system have been obtained over the full range of solar phase angles observable from earth. These first visual observations of the phase curves of Miranda, Ariel, and Umbriel show that Ariel and Miranda exhibit the large opposition surges previously seen on the two outer Uranian Satellites ...
Bonnie J. Buratti, James Gibson, Joel A. Mosher   +2 more
openaire   +1 more source

The Orbits of Uranus, Its Satellites and Rings, the Gravity Field of the Uranian System, and the Orientation of the Poles of Uranus and Its Satellites

The Astronomical Journal
R. A. Jacobson determined the orbits of the Uranian satellites, the masses of Uranus and its satellites, and the orientation of the pole of Uranus from Earth-based astrometry, Earth-based ring occultations, and observations acquired with the Voyager 2 ...
Robert A. Jacobson, Ryan S. Park
doaj   +1 more source