Stardust-NExT, Deep Impact, and the accelerating spin of 9P/Tempel 1
文献类型：期刊论文
| 作者 | Belton, Michael J. S.1; Meech, Karen J.2; Chesley, Steven3; Pittichova, Jana2; Carcich, Brian4; Drahus, Michal5; Harris, Alan6; Gillam, Stephen3; Veverka, Joseph4; Mastrodemos, Nicholas3 |
| 刊名 | ICARUS
 |
| 出版日期 | 2011-05-01 |
| 卷号 | 213期号:1页码:345-368 |
| 关键词 | Comets Comets, Nucleus Rotational dynamics Comet Tempel 1 |
| 英文摘要 | The evolution of the spin rate of Comet 9P/Tempel 1 through two perihelion passages (in 2000 and 2005) is determined from 1922 Earth-based observations taken over a period of 13 year as part of a World-Wide observing campaign and from 2888 observations taken over a period of 50 days from the Deep Impact spacecraft. We determine the following sidereal spin rates (periods): 209.023 +/- 0.025 degrees/dy (41.335 +/- 0.005 h) prior to the 2000 perihelion passage, 210.448 +/- 0.016 degrees/dy (41.055 +/- 0.003 h) for the interval between the 2000 and 2005 perihelion passages, 211.856 +/- 0.030 degrees/dy (40.783 +/- 0.006 h) from Deep Impact photometry just prior to the 2005 perihelion passage, and 211.625 +/- 0.012 degrees/dy (40.827 +/- 0.002 h) in the interval 2006-2010 following the 2005 perihelion passage. The period decreased by 16.8 +/- 0.3 min during the 2000 passage and by 13.7 +/- 0.2 min during the 2005 passage suggesting a secular decrease in the net torque. The change in spin rate is asymmetric with respect to perihelion with the maximum net torque being applied on approach to perihelion. The Deep Impact data alone show that the spin rate was increasing at a rate of 0.024 +/- 0.003 degrees/dy/dy at JD2453530.60510 (i.e., 25.134 dy before impact), which provides independent confirmation of the change seen in the Earth-based observations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000290190100021 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8096]  |
| 专题 | 国家天文台_应用天文研究部 |
| 作者单位 | 1.Belton Space Explorat Initiat LLC, Tucson, AZ 85716 USA 2.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA 3.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA 4.Cornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA 5.Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA 6.Space Sci Inst, Boulder, CO 80301 USA 7.Univ Maryland, Dept Astron, College Pk, MD 20742 USA 8.Armagh Observ, Armagh BT61 9DG, North Ireland 9.Chinese Acad Sci, Yunnan Astron Observ, Kunming 65011, Yunnan, Peoples R China 10.Univ Metropolitana Ciencias Educ, Dep Fis, Santiago, Chile |
| 推荐引用方式 GB/T 7714 | Belton, Michael J. S.,Meech, Karen J.,Chesley, Steven,et al. Stardust-NExT, Deep Impact, and the accelerating spin of 9P/Tempel 1[J]. ICARUS,2011,213(1):345-368. |
| APA | Belton, Michael J. S..,Meech, Karen J..,Chesley, Steven.,Pittichova, Jana.,Carcich, Brian.,...&Zhao, H..(2011).Stardust-NExT, Deep Impact, and the accelerating spin of 9P/Tempel 1.ICARUS,213(1),345-368. |
| MLA | Belton, Michael J. S.,et al."Stardust-NExT, Deep Impact, and the accelerating spin of 9P/Tempel 1".ICARUS 213.1(2011):345-368. |
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来源：国家天文台
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