Zobrazeno 1 - 4
of 4
pro vyhledávání: '"E. F. HELIN"'
Autor:
Brian G. Marsden, Terry K. Smith, Harold A. Weaver, Z. Sekanina, S. M. Larson, B. Zellner, E. F. Helin, M. F. A'Hearn, Keith S. Noll, James V. Scotti, C. S. Shoemaker, Alex D. Storrs, Eugene M. Shoemaker, Donald K. Yeomans, Karen J. Meech, Paul D. Feldman, D. H. Levy, Robert A. Brown, Claude Arpigny
Publikováno v:
Science. 263:787-791
The Hubble Space Telescope observed the fragmented comet P/Shoemaker-Levy 9 (1993e) (P indicates that it is a periodic comet) on 1 July 1993. Approximately 20 individual nuclei and their comae were observed in images taken with the Planetary Camera.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dd72c1aabd63ff6314e0348832c0ff5
https://doi.org/10.1126/science.263.5148.787
https://doi.org/10.1126/science.263.5148.787
Autor:
E. F. Helin, E. M. Shoemaker
Publikováno v:
International Astronomical Union Colloquium. 39:297-300
From discoveries made in several independent surveys of the sky, the number of Apollo asteroids to absolute visual magnitude 18 is estimated to be of the order of 103; the ratio of Mars-crossing asteroids to Apcllos is estimated to lie between 10 and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c076e3e453cecf83095c7725fdd0d0a2
https://doi.org/10.1017/s0252921100070202
https://doi.org/10.1017/s0252921100070202
Publikováno v:
Exploration of Halley’s Comet ISBN: 9783642829734
On wide-field photographs from late April till early June 1986, comet Halley is seen to display a spike-like extension in the general direction of the Sun, projecting to distances of about 700,000 km from the nucleus. The spike was composed of dust a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a20578132c7263f95c1ce7f50771e42f
https://doi.org/10.1007/978-3-642-82971-0_116
https://doi.org/10.1007/978-3-642-82971-0_116
