Zobrazeno 1 - 10
of 23
pro vyhledávání: '"W. H. Jefferys"'
Autor:
W. F. van Altena, C. -L. Lu, J. T. Lee, T. M. Girard, X. Guo, C. P. Deliyannis, I. Platais, V. Kozhurina-Platais, B. McArthur, G. F. Benedict, R. L. Duncombe, P. D. Hemenway, W. H. Jefferys, J. R. King, E. Nelan, P. S. Shelus, D. Story, A. Whipple, O. G. Franz, L. Wasserman, L. W. Fredrick, R. B. Hanson, A. R. Klemola, B. F. Jones, R. Méndez, W.-S. Tsay, A. Bradley
Publikováno v:
The Astrophysical Journal. 486:L123-L127
Trigonometric parallax observations made with the Hubble Space Telescope's Fine Guidance Sensor #3 (HST FGS) of seven Hyades Cluster members in six fields of view have been analyzed along with their proper motions to determine the distance to the clu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8893d2fb29ea747325cc254ad03196e7
https://doi.org/10.1086/310856
https://doi.org/10.1086/310856
Autor:
T. M. Girard, Y. Li, W. F. Van Altena, J. M. Nunez, G. F. Benedict, R. L. Duncombe, P. D. Hemenway, W. H. Jefferys, B. McArthur, J. McCartney, E. Nelan, P. Shelus, D. Story, A. L. Whipple, O. G. Franz, L. W. Wasserman, L. W. Fredrick
Publikováno v:
Symposium - International Astronomical Union. 166:101-106
The astrometric capability of the Hubble Space Telescope Planetary Camera (WF/PC1) is investigated, motivated by a study of the internal velocity distribution of globular clusters. The astrometric accuracy of the HST PC will be determined ultimately
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05a126938919707626eb635baede40c0
https://doi.org/10.1017/s0074180900227927
https://doi.org/10.1017/s0074180900227927
Publikováno v:
Symposium - International Astronomical Union. 141:339-346
The Hubble Space Telescope, a large optical instrument having an aperture of 2.4 meters and a length of 8.8 meters has been developed by the U.S. National Aeronautics and Space Administration in cooperation with the European Space Agency. The Space S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acdc6704ef97324afe0b97b61c8eb13c
https://doi.org/10.1017/s0074180900087039
https://doi.org/10.1017/s0074180900087039
Autor:
B. E. McArthur, G. F. Benedict, J. Lee, W. F. van Altena, C. L. Slesnick, J. Rhee, R. J. Patterson, L. W. Fredrick, T. E. Harrison, W. J. Spiesman, E. Nelan, R. L. Duncombe, P. D. Hemenway, W. H. Jefferys, P. J. Shelus, O. G. Franz, L. H. Wasserman
TV Columbae (TV Col) is a 13th magnitude Intermediate Polar (IP) Cataclysmic Variable (CV), with multiple periods found in the light curves. Past estimates predicted a distance of 400 parsec to greater than 500 parsec. Recently completed Hubble Space
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::996595e52f4272e9c8780a0d02175048
Autor:
J. Kovalevsky, V. A. Brumberg, E. P. Aksenov, J. Chapront, S. Ferraz-Mello, J. Hadjidemetriou, J. Henrard, W. H. Jefferys, Y. Kozai, H. Scholl, P. K. Seidelmann, A. Sinclair
Publikováno v:
Transactions of the International Astronomical Union. 19:15-28
Celestial Mechanics has undergone, in the past three years, a considerable development that has been marked by a significant increase of published papers and by the recent organization of several specialized colloquia or symposia. The reasons of this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08f01357d93c5ebc5cd23ab7f0c0eba6
https://doi.org/10.1017/s0251107x00006076
https://doi.org/10.1017/s0251107x00006076
Publikováno v:
Physica D: Nonlinear Phenomena. 29:84-94
We have obtained escape-speed diagrams for a conservative one-parameter quadratic mapping of the plane to itself (the Cremona Map). The escape speed of orbits appears to have a fractal distribution (in the plane) which is related to the eigenvectors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2be63803626ffce798d86519351d062c
https://doi.org/10.1016/0167-2789(87)90048-0
https://doi.org/10.1016/0167-2789(87)90048-0
Autor:
L. M. Ries, W. H. Jefferys
Publikováno v:
Symposium - International Astronomical Union. 81:171-176
Upcoming missions to the outer planets have made evident the need for better theories of their satellites. We have been involved in an effort to provide better satellite theories through new observations (Abbot, Mulholland and Shelus 1975; Mulholland
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5b75220a6856072bb85667823c104d0
https://doi.org/10.1017/s0074180900012687
https://doi.org/10.1017/s0074180900012687
Publikováno v:
Physics Today. 20:9-15
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c73e07a1bd2cafd80ee2ceb04f36f052
https://doi.org/10.1063/1.3034337
https://doi.org/10.1063/1.3034337
Autor:
W. H. Jefferys, L. M. Ries
Publikováno v:
Dynamics of the Solar System ISBN: 9789027709776
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e37b087c9b6afb3ff10c71b853decc29
https://doi.org/10.1007/978-94-010-9256-2_29
https://doi.org/10.1007/978-94-010-9256-2_29
Publikováno v:
Dynamics of Planets and Satellites and Theories of Their Motion ISBN: 9789400998117
A program is underway at the McDonald Observatory to extend the series of photographic observations of the satellites of the outer planets (Abbot, Mulholland and Shelus, A.J. 80, 1975), and concurrent theoretical studies have led to a new orbital the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad1831531e9a5ee6607f52cfd97d0b9a
https://doi.org/10.1007/978-94-009-9809-4_28
https://doi.org/10.1007/978-94-009-9809-4_28