Warner Brian D, Stephens Robert D, Harris Alan W
Center for Solar System Studies - Palmer Divide Station, 446 Sycamore Ave., Eaton, CO 80615 USA.
Center for Solar System Studies / MoreData!, Rancho Cucamonga, CA USA.
Minor Planet Bull. 2015 Jan-Mar;42(1):31-34.
CCD observations of three asteroids were made at the Center for Solar System Studies in mid-2014. The Hungaria member 1727 Mette is a known binary system. We saw no evidence of the satellite in 2014, which - assuming the satellite's orbit is nearly in the primary's equatorial rotational plane - leads to an estimate for the primary's spin axis orientation. The near-Earth asteroid (NEA) (68063) 2000 YJ66 has a primary spin period just at the spin barrier of 2.2 hours. Another NEA, 2014 PL51, looks to be one of a small number of wide binary candidates, which are characterized by a large amplitude lightcurve with a period of hundreds of hours superimposed by a short period, low amplitude lightcurve.
2014年年中，在太阳系研究中心对三颗小行星进行了电荷耦合器件（CCD）观测。匈牙利族小行星1727 Mette是一个已知的双星系统。2014年我们没有发现该卫星的迹象，假设卫星轨道几乎位于主星的赤道旋转平面内，由此可对主星的自转轴方向进行估计。近地小行星（NEA）(68063) 2000 YJ66的主自转周期刚好处于2.2小时的自转障碍。另一颗近地小行星2014 PL51似乎是少数宽距双星候选体之一，其特征是具有周期为数百小时的大幅度光变曲线，并叠加有短周期、低幅度的光变曲线。
