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首页> 外文期刊>Planetary and space science >11 264 Claudiomaccone: Small binary main-belt asteroid
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11 264 Claudiomaccone: Small binary main-belt asteroid

机译：11264 Claudiomaccone：小型二元主带小行星

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摘要

Photometric CCD observations of the small main-belt asteroid 11264 Claudiomaccone, carried out with the 0.7-m telescope at Chuguev Observation Station (Kharkiv, Ukraine) in November 2004 and the 1-m telescope at Simeiz Observatory (Crimea, Ukraine) in December 2004, have shown the presence of two different periods in asteroid brightness variations. A short period of 3.1872 ± 0.0006 h and long one of 15.11 ± 0.01 h were determined. The analysis of lightcurves allowed us to suppose that asteroid 11264 Claudiomaccone is an asynchronous binary system in the main belt. The short period is interpreted as a rotational period of the larger (primary) body. The long period component has sharp dips characteristic of mutual eclipse phenomena and is therefore interpreted as the orbital period of the secondary. The parameters of the system are estimated to be: the ratio of the secondary to primary diameters is ≥ 0.31, based on the depth of the apparently partial eclipses, the ratio of the orbital radius to the primary's diameter is about 1.5 and a bulk density of the primary body is ρ_p ≥ 1.2g/cm~3. We obtained the asteroid phase curve parameters H= 14.30, G = 0.10 and measured color index V - R = 0.52. These data allow to suppose that the asteroid belongs to S (or Q) type and to estimate effective diameter of the system to be 4.2 km, based on the average albedo of objects of these taxonomic classes.
机译：小型主带小行星11264 Claudiomaccone的光度CCD观测于2004年11月在Chuguev观测站（乌克兰哈尔科夫）进行了0.7米望远镜的观测，并于2004年12月在Simeiz天文台（乌克兰克里米亚）进行了1-m望远镜的观测。 ，显示了小行星亮度变化中存在两个不同的周期。确定短时间为3.1872±0.0006 h，长时间为15.11±0.01 h。通过对光曲线的分析，我们可以假设小行星11264 Claudiomaccone是主带中的一个异步二进制系统。短周期被解释为较大（主要）物体的旋转周期。长周期分量具有相互食蚀现象的急剧下降特性，因此被解释为次级分量的轨道周期。该系统的参数估计为：次级直径与初级直径之比≥0.31，基于明显的部分月蚀的深度，轨道半径与初级直径之比约为1.5，堆积密度为主体为ρ_p≥1.2g / cm〜3。我们获得了小行星相位曲线参数H = 14.30，G = 0.10，测得的颜色指数V-R = 0.52。这些数据可以假设这些小行星属于S（或Q）类型，并根据这些分类类别的物体的平均反照率估算出该系统的有效直径为4.2 km。

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