根据K2测量的十个半人马座的光变曲线
Light curves of ten Centaurs from K2 measurements
摘要：
在这里，我们提出了在K2任务的框架内使用开普勒太空望远镜对10个半人马座的可见光范围光变曲线观测的结果。定义良好的周期性光变曲线，在六种情况下，使我们能够获得旋转周期，一个显着的增加半人马座的数量与已知的旋转特性。（471931）2013 PH44和（250112）2002 KY14的低振幅光变曲线可以用双态变斑、二元性或拉长形状来解释。（353222）2009 YD7和（514312）2016 AE193可能是旋转的细长天体，而2017 CX 33和2012 VU85是最有希望的候选者，因为它们的旋转速度慢，光变曲线振幅更高。（463368）2012 VU85在半人马座中具有最长的自转周期，P=56.2h。这两颗潜在双星的自转周期P> 20小时，这说明了对太阳系目标进行长时间、不间断的时间序列测光的重要性，这种测光只能在航天器上进行，比如K2任务中的开普勒，以及目前正在运行的TESS任务。
英文摘要：
Here we present the results of visible range light curve observations of ten Centaurs using the Kepler Space Telescope in the framework of the K2 mission. Well defined periodic light curves are obtained in six cases allowing us to derive rotational periods, a notable increase in the number of Centaurs with known rotational properties. The low amplitude light curves of (471931) 2013 PH44 and (250112) 2002 KY14 can be explained either by albedo variegations, binarity or elongated shape. (353222) 2009 YD7 and (514312) 2016 AE193 could be rotating elongated objects, while 2017 CX33 and 2012 VU85 are the most promising binary candidates due to their slow rotations and higher light curve amplitudes. (463368) 2012 VU85 has the longest rotation period, P=56.2h observed among Centaurs. The P>20h rotation periods obtained for the two potential binaries underlines the importance of long, uninterrupted time series photometry of solar system targets that can suitably be performed only from spacecraft, like the Kepler in the K2 mission, and the currently running TESS mission.
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