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首页> 外文期刊>The Astrophysical journal >RECOVERING THE ROTATIONAL LIGHT CURVE OF PHOEBE
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RECOVERING THE ROTATIONAL LIGHT CURVE OF PHOEBE

机译：恢复PHOEBE的旋转光曲线

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摘要

We present rotational light-curve data for Saturn's satellite Phoebe taken over the observing period prior to the Cassini mission's encounter with that moon. We find a rotation period of 9.2735 +- 0.0006 hr, a factor of 25 improvement in the rotation period's uncertainty over previously published data. This improved rotation period measurement allow s us to correlate previously observed spectral features and colors with albedo features observed by Voyager and to predict which side of Phoebe will be observed by Cassini during its 2004 June 11 encounter. The light curve, sampled at subobserver latitudes farther south than achieved by Voyager, shows evidence of surface features that cannot be explained by previously published shape models or albedo maps and that may be located in the regions in Phoebe's southern hemisphere that were unobserved by Voyager.
机译：我们提供了在卡西尼号任务与月球相遇之前的观测期内，土星卫星菲比的旋转光曲线数据。我们发现旋转周期为9.2735±0.0006 hr，这是旋转周期不确定性比以前发布的数据提高了25倍。这种改进的旋转周期测量使我们能够将先前观测到的光谱特征和颜色与旅行者号观测到的反照率特征相关联，并预测卡西尼号在2004年6月11日的遭遇中将观测到菲比的哪一侧。在比旅行者号更远的南观测者纬度处采样的光曲线显示了表面特征的证据，这些表面特征无法用先前发布的形状模型或反照率图来解释，并且可能位于菲比南半球的旅行者未观测到的区域中。

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