Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Edwin S. Barker"'
Publikováno v:
Acta Astronautica. 65:103-111
The Michigan Orbital DEbris Survey Telescope (MODEST) is normally used to survey the geosynchronous orbit (GEO) environment to obtain a statistical assessment of the debris population. Due to the short time that the object is in the field-of-view (us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::984950fcbca61c55682396e674cd5c95
https://doi.org/10.1016/j.actaastro.2009.01.031
https://doi.org/10.1016/j.actaastro.2009.01.031
Publikováno v:
Icarus. 199:119-128
We report on low-spectral resolution observations of comet 9P/Tempel 1 from 1983, 1989, 1994 and 2005 using the 2.7m Harlan J. Smith telescope of McDonald Observatory. This comet was the target of NASA's Deep Impact mission and our observations allow
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa7b9b9409c08bb2bbced350e163dc19
https://doi.org/10.1016/j.icarus.2008.08.015
https://doi.org/10.1016/j.icarus.2008.08.015
Autor:
Tobias Owen, Kandy S. Jarvis, Susan M. Lederer, Edwin S. Barker, Faith Vilas, Michael S. P. Kelley
Publikováno v:
Icarus. 170:125-130
Narrowband reflectance spectra (0.53–1.0 μm) of Iapetus' leading and trailing sides were obtained in 2000 to test the presence of an absorption feature located near 0.67 μm seen in reflectance spectra of Iapetus' dark material and Hyperion's surf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2bb5c5908a88d5dc54f27cede3e227bb
https://doi.org/10.1016/j.icarus.2004.01.016
https://doi.org/10.1016/j.icarus.2004.01.016
Autor:
Nicholas M. Schneider, Antonin Bouchez, M. H. Burger, Yaron Sheffer, Michael E. Brown, A. Mallama, I. de Pater, Edwin S. Barker, Laurence M. Trafton
Publikováno v:
The Astrophysical Journal. 563:1063-1074
We have measured the column density profile of Io's sodium corona using 10 mutual eclipses between the Galilean satellites. This approach circumvents the problem of spatially resolving Io's corona directly from Io's bright continuum in the presence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7204f88d18c8e0e4eb87b794ab573112
https://doi.org/10.1086/323944
https://doi.org/10.1086/323944
Publikováno v:
Journal of Geophysical Research: Planets. 106:32841-32845
The impact of the Lunar Prospector spacecraft in a lunar polar crater was used in an (unsuccessful) attempt to detect the release of vapor from volatilized water ice. The short-time evolution of such an impulsively produced atmosphere is discussed. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb6a5322aa0221adacfc24121375ae11
https://doi.org/10.1029/2000je001326
https://doi.org/10.1029/2000je001326
Autor:
Alan B. Binder, David Goldstein, R. Steven Nerem, Edwin S. Barker, W. C. Feldman, J. Victor Austin
Publikováno v:
Geophysical Research Letters. 26:1653-1656
Lunar Prospector data support the contention that water ice reservoirs exist in the permanently shaded craters near the lunar poles. Yet the question remains whether the detected hydrogen abundance is actually water ice or is hydrogen in some other f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5a1467ce4c5c5277441de7d576efd36
https://doi.org/10.1029/1999gl900384
https://doi.org/10.1029/1999gl900384
Publikováno v:
Icarus. 131:449-453
A sensitive search for potential atomic neutrals in Io's extended atmosphere and torus was made using the 2.1-m telescope at McDonald Observatory. Although no new atomic species were detected, our observation put stricter upper limits on many neutral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e70a1d29dc4615c860a586bbbfc63af
https://doi.org/10.1006/icar.1997.5879
https://doi.org/10.1006/icar.1997.5879
Autor:
Edwin S. Barker, W. R. Pryor, C. Y. Na, B. J. Armosky, William D. Cochran, Anita L. Cochran, C. E. Pulliam
Publikováno v:
Planetary and Space Science. 45:1299-1313
Simultaneous light curves of the Comet Shoemaker-Levy 9 fragment R and V impacts were measured with the McDonald Observatory 2.7 m and 0.8 m telescopes, at wavelengths of 2.12 μm and 0.893 μm, respectively. The R impact was clearly detected at 2.12
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6529eb9baf5c93f1936161b900619c8b
https://doi.org/10.1016/s0032-0633(97)00101-3
https://doi.org/10.1016/s0032-0633(97)00101-3
Publikováno v:
Earth, Moon, and Planets. 78:93-98
Very-high spectral resolution observations of the neutral Na emission have enabled measurements of the velocity dispersions of the Na atoms within ∼40,000 km of the opto center of Hale-Bopp. Asymmetric Na D line profiles imply both an in situ or co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b79602f80acd40a82dc466ac9f4bd51
https://doi.org/10.1023/a:1006239832055
https://doi.org/10.1023/a:1006239832055
Autor:
William D. Smythe, Arthur L. Lane, Bruce Hapke, Robert M. Nelson, B. Wallis, Edwin S. Barker, Linda J. Horn
Publikováno v:
Icarus. 123:568-577
We observed slected mutual occultations of Jupiter's satellites in 1990-1991 and we used the occultation profiles to constrain the areal distribution of selected spectrally active compounds on Io's surface.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23fc73f556c1be981aceb75b036a976a
https://doi.org/10.1006/icar.1996.0179
https://doi.org/10.1006/icar.1996.0179