Photometric observations of 107P/Wilson-Harrington
Photometric observations of 107P/Wilson-Harrington
复制标题
107P/Wilson-Harrington 的光度观测
DOI：
10.1016/j.icarus.2011.06.044
复制
发表时间：
2011
期刊：
影响因子：
3.2
通讯作者：
S.
中科院分区：
文献类型：
--
作者：
Urakawa;S.
我们给出了用五个中小型望远镜对107P/Wilson-Harrington进行的光曲线观测和多波段测光。光曲线的周期为0.2979天(7.15小时)和0.0993天(2.38小时)，可公度性为3：1。光曲线的物理性质表明：(1)107P/Wilson-Harrington是一个滚滚天体，恒星自转周期为0.2979天，进动周期为0.0993天。该形状的长轴模式(LAM)为L1：L2：L3=1.0：1.0：1.6。总转动角动量的方向约为λ=310°，β=−10°，或λ=132°，β=−17°。章动角在65°时近似恒定。(2)107便士/威尔逊-哈林顿不是平底锅。恒星自转周期为0.2979天。形状接近球形，但略呈六边形，短轴模式(SAM)为L1：L2：L3=1.5：1.5：1.0。磁极取向约为λ=330°，β=−为27°。此外，该模型还包括二进制托管的可能性。对于这两种模型，旋转的感觉都是逆行的。此外，多波段光度分析表明，107P/Wilson-Harrington的分类等级为C型。表面上没有明显的旋转颜色变化。
We present lightcurve observations and multiband photometry for 107P/Wilson–Harrington using five small- and medium-sized telescopes. The lightcurve has shown a periodicity of 0.2979day (7.15h) and 0.0993day (2.38h), which has a commensurability of 3:1. The physical properties of the lightcurve indicate two models: (1) 107P/Wilson–Harrington is a tumbling object with a sidereal rotation period of 0.2979day and a precession period of 0.0993day. The shape has a long axis mode (LAM) of L1:L2:L3=1.0:1.0:1.6. The direction of the total rotational angular momentum is around λ=310°, β=−10°, or λ=132°, β=−17°. The nutation angle is approximately constant at 65°. (2) 107P/Wilson–Harrington is not a tumbler. The sidereal rotation period is 0.2979day. The shape is nearly spherical but slightly hexagonal with a short axis mode (SAM) of L1:L2:L3=1.5:1.5:1.0. The pole orientation is around λ=330°, β=−27°. In addition, the model includes the possibility of binary hosting. For both models, the sense of rotation is retrograde. Furthermore, multiband photometry indicates that the taxonomy class of 107P/Wilson–Harrington is C-type. No clear rotational color variations are confirmed on the surface.