| DOI: | 10.1002/2015GL065101
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| 论文题名: | The low-degree shape of Mercury |
| 作者: | Perry M.E.; Neumann G.A.; Phillips R.J.; Barnouin O.S.; Ernst C.M.; Kahan D.S.; Solomon S.C.; Zuber M.T.; Smith D.E.; Hauck S.A.; Peale S.J.; Margot J.-L.; Mazarico E.; Johnson C.L.; Gaskell R.W.; Roberts J.H.; McNutt R.L.; Jr.; Oberst J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9502
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| EISSN: | 1944-9233
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| 出版年: | 2015
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| 卷: | 42, 期:17 | | 起始页码: | 6951
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| 结束页码: | 6958
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| 语种: | 英语
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| 英文关键词: | altimetry
; Mercury
; occultation
; shape
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| Scopus关键词: | Aneroid altimeters
; Balloons
; Spacecraft
; Tracking (position)
; Altimetry
; Internal structure
; Mercury laser altimeters
; Northern Hemispheres
; Occultation
; Shape
; Southern Hemisphere
; Space environment
; Mercury (metal)
; altimetry
; geoid
; laser
; Mercury (planet)
; Southern Hemisphere
; thermal evolution
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| 英文摘要: | The shape of Mercury, particularly when combined with its geoid, provides clues to the planet's internal structure, thermal evolution, and rotational history. Elevation measurements of the northern hemisphere acquired by the Mercury Laser Altimeter on the MErcury Surface, Space ENvironment, GEochemistry, and Ranging spacecraft, combined with 378 occultations of radio signals from the spacecraft in the planet's southern hemisphere, reveal the low-degree shape of Mercury. Mercury's mean radius is 2439.36 ± 0.02 km, and there is a 0.14 km offset between the planet's centers of mass and figure. Mercury is oblate, with a polar radius 1.65 km less than the mean equatorial radius. The difference between the semimajor and semiminor equatorial axes is 1.25 km, with the long axis oriented 15 west of Mercury's dynamically defined principal axis. Mercury's geoid is also oblate and elongated, but it deviates from a sphere by a factor of 10 less than Mercury's shape, implying compensation of elevation variations on a global scale. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943353837&doi=10.1002%2f2015GL065101&partnerID=40&md5=a66c6eccbd06c8b9e98cc274b43f9c2e
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9117
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States
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| Recommended Citation: | |
Perry M.E.,Neumann G.A.,Phillips R.J.,et al. The low-degree shape of Mercury[J]. Geophysical Research Letters,2015-01-01,42(17).
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