| タイトル | Venus - Improved spin vector from Goldstone radar observations |
| 著者（英） | Zohar, S.; Slade, M. A.; Jurgens, R. F. |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1990-10-01 |
| 言語 | eng |
| 内容記述 | Twenty-one radar images of the surface of Venus obtained between 1972 and 1982 have been compared to follow the motion of 28 distinct features. The delays and Doppler shifts of these features with respect to the subradar points on the various days were used in a nonlinear least-squares parameter estimation algorithm to refine the period and pole orientation of Venus. The period is found to be -243.022 + or - 0.003 days; the right ascension and declination of the pole are: alpha = 272.816 + or - 0.14 deg; beta = 67.218 + or - 0.05 deg (B1950). These standard error estimates attempt to include effects of systematic errors. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 90A53105 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/353381 |
