Physical modelling of near-Earth asteroid (23187) 2000 PN9 with ground-based optical and radar observations
Physical modelling of near-Earth asteroid (23187) 2000 PN9 with ground-based optical and radar observations
复制标题
利用地面光学和雷达观测对近地小行星 (23187) 2000 PN9 进行物理建模
DOI：
10.1093/mnras/stad2528
复制
发表时间：
2023
影响因子：
4.8
通讯作者：
Dover L
中科院分区：
文献类型：
--
作者：
Dover L
我们给出了潜在危险的小行星(23187)2000PN9的物理模型和自旋态分析。作为直接探测Yarkovsky-O‘Keefe-Radzievskii-Paddack(YORP)效应的长期行动的一部分，我们收集了2006至2020年间这颗小行星的光学光曲线。这些观测数据与行星雷达数据相结合，形成了一个详细的形状模型，用于搜索YORP加速度。我们报告说，2000PN9是一个相对较大的顶形天体，恒星自转周期为2.53216±0.00015 h。虽然我们没有发现自转加速的证据，但不能排除YORP扭矩比这更小的可能性。2000年的PN9很可能是一个YORP进化的天体，可能是YORP均衡或自我限制的一个例子。
We present a physical model and spin-state analysis of the potentially hazardous asteroid (23187) 2000 PN9. As part of a long-term campaign to make direct detections of the Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect, we collected optical light curves of the asteroid between 2006 and 2020. These observations were combined with planetary radar data to develop a detailed shape model, which was used to search for YORP acceleration. We report that 2000 PN9 is a relatively large top-shaped body with a sidereal rotation period of 2.53216 ± 0.00015 h. Although we find no evidence for rotational acceleration, YORP torques smaller thancannot be ruled out. It is likely that 2000 PN9 is a YORP-evolved object, and may be an example of YORP equilibrium or self-limitation.