论文标题
露西目标（11351）白色白斑的凸形和旋转模型
Convex Shape and Rotation Model of Lucy Target (11351) Leucus from Lightcurves and Occultations
论文作者
论文摘要
我们报告了露西任务目标（11351）Leucus在2017年，2018年和2019年幻影中获得的新的光度光曲面观测。我们将这些数据与在五个时期期间捕获的恒星掩体结合使用（Buie等，2020）来确定恒星旋转周期，旋转轴方向，凸形形状模型，对象的绝对尺度，其几何Albedo的绝对尺度，其几何构图，以及目标的光度特性的模型。我们发现，白菜是一个旋转轴的旋转轴，位于J2000 ecliptic坐标的天空射击半径为3°（1 $σ$）内（$λ= 208°$，$β=+77°$）或J2000赤道均值（RA = 248 $ $ $ $，$，dec =+58888888888888888888888888888888888888888888888888888888888 $°）。恒星周期已完善为$ p_ {sid} = 445.683 \ pm0.007 $ h。凸形模型是不规则的，最大尺寸为（60.8，39.1，27.8）km。凸模型说明了隐匿性轮廓的全球特征，尽管较小的偏差表明存在局部和全球凹陷。我们确定一个几何反照率$ p_v = 0.043 \ pm0.002 $。派生的相曲线支持白肉的D型分类。
We report new photometric lightcurve observations of the Lucy Mission target (11351) Leucus acquired during the 2017, 2018 and 2019 apparitions. We use these data in combination with stellar occultations captured during five epochs (Buie et al. 2020) to determine the sidereal rotation period, the spin axis orientation, a convex shape model, the absolute scale of the object, its geometric albedo, and a model of the photometric properties of the target. We find that Leucus is a prograde rotator with a spin axis located within a sky-projected radius of 3° (1$σ$) from J2000 Ecliptic coordinates ($λ=208°$, $β=+77°$) or J2000 Equatorial Coordinates (RA=248$°$, Dec=+58$°$). The sidereal period is refined to $P_{sid}=445.683\pm0.007$ h. The convex shape model is irregular, with maximum dimensions of (60.8, 39.1, 27.8) km. The convex model accounts for global features of the occultation silhouettes, although minor deviations suggest that local and global concavities are present. We determine a geometric albedo $p_V=0.043\pm0.002$. The derived phase curve supports a D-type classification for Leucus.
