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首页> 外文期刊>Celestial Mechanics and Dynamical Astronomy >Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009
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Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009

机译：国际天文学联盟制图坐标和旋转要素工作组的报告：2009年

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Every three years the IAU Working Group on Cartographic Coordinates and Rotational Elements revises tables giving the directions of the poles of rotation and the prime meridians of the planets, satellites, minor planets, and comets. This report takes into account the IAU Working Group for Planetary System Nomenclature (WGPSN) and the IAU Committee on Small Body Nomenclature (CSBN) definition of dwarf planets, introduces improved values for the pole and rotation rate of Mercury, returns the rotation rate of Jupiter to a previous value, introduces improved values for the rotation of five satellites of Saturn, and adds the equatorial radius of the Sun for comparison. It also adds or updates size and shape information for the Earth, Mars’ satellites Deimos and Phobos, the four Galilean satellites of Jupiter, and 22 satellites of Saturn. Pole, rotation, and size information has been added for the asteroids (21) Lutetia, (511) Davida, and (2867) Šteins. Pole and rotation information has been added for (2) Pallas and (21) Lutetia. Pole and rotation and mean radius information has been added for (1) Ceres. Pole information has been updated for (4) Vesta. The high precision realization for the pole and rotation rate of the Moon is updated. Alternative orientation models for Mars, Jupiter, and Saturn are noted. The Working Group also reaffirms that once an observable feature at a defined longitude is chosen, a longitude definition origin should not change except under unusual circumstances. It is also noted that alternative coordinate systems may exist for various (e.g. dynamical) purposes, but specific cartographic coordinate system information continues to be recommended for each body. The Working Group elaborates on its purpose, and also announces its plans to occasionally provide limited updates to its recommendations via its website, in order to address community needs for some updates more often than every 3 years. Brief recommendations are also made to the general planetary community regarding the need for controlled products, and improved or consensus rotation models for Mars, Jupiter, and Saturn.
机译：国际天文学联合会的制图坐标和旋转要素工作组每三年修订一次表，其中给出了旋转极点的方向以及行星，卫星，小行星和彗星的本初子午线的方向。该报告考虑了IAU行星系统命名工作组（WGPSN）和IAU矮行星命名委员会（CSBN）对矮行星的定义，介绍了水星的极点和旋转率的改进值，返回了木星的旋转率还原为先前的值，为土星的五颗卫星的旋转引入改进的值，并添加太阳的赤道半径以进行比较。它还添加或更新了地球，火星的Deimos和Phobos卫星，木星的四颗伽利略卫星和土星的22颗卫星的大小和形状信息。已为小行星（21）Lutetia，（511）Davida和（2867）Šteins添加了极，旋转和大小信息。已为（2）Pallas和（21）Lutetia添加了磁极和旋转信息。已为（1）Ceres添加了磁极和旋转以及平均半径信息。极点信息已更新（4）Vesta。更新了月球的极点和旋转速度的高精度实现。记录了火星，木星和土星的替代定向模型。工作组还重申，一旦选择了在定义的经度上可观察的特征，经度定义的原点就不会改变，除非在特殊情况下。还应注意的是，出于各种目的（例如，动态的），可能存在替代的坐标系，但是对于每个身体，仍继续推荐特定的地图坐标系信息。工作组详细说明了其目的，并宣布了其计划，偶尔会通过其网站对建议进行有限的更新，以解决社区每隔三年更新一次的需求。还向一般行星界提出了有关受控产品需求的简短建议，并提出了火星，木星和土星的改进或共识旋转模型。

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