Zobrazeno 1 - 10
of 72
pro vyhledávání: '"MICHAEL K. SHEPARD"'
Autor:
Michael K. Shepard
Where do asteroids come from and what are they made of? What clues do they hold about the evolution of the Solar System? Scientists have catalogued hundreds of thousands of asteroids, and many are thought to contain water and amino acids, the buildin
Autor:
Katherine de Kleer, Saverio Cambioni, Carolina Rodriguez Sanchez-Vahamonde, Maria Camarca, Edgard G. Rivera-Valentin, Michael K. Shepard, John Moore, Patrick A. Taylor, Anne Virkki, Luisa F. Zambrano-Marin, Christopher Magri, David W. Dunham
We develop a shape model of asteroid 16 Psyche using observations acquired in a wide range of wavelengths: Arecibo S-band delay-Doppler imaging, Atacama Large Millimeter Array (ALMA) plane-of-sky imaging, adaptive optics (AO) images from Keck and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d193da23bec6b5f6609b5a660174876
https://resolver.caltech.edu/CaltechAUTHORS:20210726-213747363
https://resolver.caltech.edu/CaltechAUTHORS:20210726-213747363
The asteroid (16) Psyche is the largest of the M-type asteroids, which have been hypothesized to be the cores of disrupted planetesimals and the parent bodies of the iron meteorites. While recent evidence has collected against a pure metal compositio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13a9f09bd933bb949651b6f37f4a297c
http://arxiv.org/abs/2105.11372
http://arxiv.org/abs/2105.11372
Autor:
B. Timerson, Anne Virkki, Alessondra Springmann, Daniel J. Scheeres, Michael C. Nolan, Lance A. M. Benner, Jon D. Giorgini, Michael K. Shepard, Christopher Magri, Patrick A. Taylor, Ellen S. Howell
Publikováno v:
Icarus. 311:197-209
We used three different sets of Arecibo delay-Doppler radar images and five well-covered occultations to generate a revised three-dimensional shape model of asteroid (216) Kleopatra with a spatial resolution of ∼10 km. We find Kleopatra to be a bi-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78d8a347d0df44f020b25ed0d5d7aba8
https://doi.org/10.1016/j.icarus.2018.04.002
https://doi.org/10.1016/j.icarus.2018.04.002
Autor:
Ellen S. Howell, Laird M. Close, Michael C. Nolan, Vishnu Reddy, Patrick A. Taylor, B. Timerson, Alan W. Harris, Brian D. Warner, Linda A. Rodriguez-Ford, Máté Ádámkovics, Jon D. Giorgini, Mikko Kaasalainen, Matti Viikinkoski, Lance A. M. Benner, Katherine de Kleer, Christopher Magri, Katie M. Morzinski, James E. Richardson, Imke de Pater, Al Conrad, Michael K. Shepard, Jared R. Males
Publikováno v:
Icarus. 281:388-403
Using the S-band radar at Arecibo Observatory, we observed 16 Psyche, the largest M-class asteroid in the main belt. We obtained 18 radar imaging and 6 continuous wave runs in November and December 2015, and combined these with 16 continuous wave run
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::303e27c054ab41c61f89955b0a989bb5
https://doi.org/10.1016/j.icarus.2016.08.011
https://doi.org/10.1016/j.icarus.2016.08.011
Autor:
Michael K. Shepard
Publikováno v:
Science Trends.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56b2cbe19eca42c438f9817d65a3443b
https://doi.org/10.31988/scitrends.28202
https://doi.org/10.31988/scitrends.28202
Autor:
William J. Merline, Michael K. Shepard, Lance A. M. Benner, Alessondra Springmann, Beth E. Clark, M. Ockert-Bell, Dan Coley, Michael C. Nolan, Jon D. Giorgini, Ellen S. Howell, Patrick A. Taylor, Alan W. Harris, Christopher Magri, Andrew S. Rivkin, Robert D. Stephens, Brian D. Warner
Publikováno v:
Icarus. 245:38-55
Using the S-band radar at Arecibo Observatory, we observed thirteen X/M-class asteroids; nine were previously undetected and four were re-observed, bringing the total number of Tholen X/M-class asteroids observed with radar to 29. Of these 29M-class
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34dcde53de86d7aa24af425ec6a37b65
https://doi.org/10.1016/j.icarus.2014.09.016
https://doi.org/10.1016/j.icarus.2014.09.016
Publikováno v:
Icarus. 336:113456
We have acquired a comprehensive laboratory bidirectional measurements of Apollo 11 and Apollo 16 lunar soil samples and have successfully fit photometric models to the laboratory data and have determined the solar spectrum averaged hemispheric refle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d62e40dc8a68daedddde3870f924f80b
https://doi.org/10.1016/j.icarus.2019.113456
https://doi.org/10.1016/j.icarus.2019.113456