| タイトル | Rationalization of Comet Halley's periods |
| 著者（英） | Belton, Michael J. S. |
| 著者所属（英） | National Optical Astronomy Lab. |
| 発行日 | 1990-07-01 |
| 言語 | eng |
| 内容記述 | The sense of long axis orientation of Comet Halley during the Vega 1 encounter must be reversed from that deduced by Sagdeev et al. (1986) in order to harmonize the comet nucleus' Vega/Giotto-observed orientations with periodicities extracted from time-series brightness data. It is also demonstrated that Vega/Giotto observations can be satisfied by either a 2.2- or 3.7-day long-axis free precession period. A novel Fourier algorithm is used to reanalyze five independent data sets; strong evidence is adduced for periods harmonically related to a 7.4-day period. The preferred candidate models for Halley's nuclear rotation are characterized by a long-axis precession period of 3.7 days. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 90A40429 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/355322 |
