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The EURONEAR Lightcurve Survey of Near Earth Asteroids
Earth, Moon, and Planets ( IF 0.9 ) Pub Date : 2017-07-20 , DOI: 10.1007/s11038-017-9506-9
O. Vaduvescu , A. Aznar Macias , V. Tudor , M. Predatu , A. Galád , Š. Gajdoš , J. Világi , H. F. Stevance , R. Errmann , E. Unda-Sanzana , F. Char , N. Peixinho , M. Popescu , A. Sonka , R. Cornea , O. Suciu , R. Toma , P. Santos-Sanz , A. Sota , J. Licandro , M. Serra-Ricart , D. Morate , T. Mocnik , M. Diaz Alfaro , F. Lopez-Martinez , J. McCormac , N. Humphries

This data paper presents lightcurves of 101 near Earth asteroids (NEAs) observed mostly between 2014 and 2017 as part of the EURONEAR photometric survey using 11 telescopes with diameters between 0.4 and 4.2 m located in Spain, Chile, Slovakia and Romania. Most targets had no published data at the time of observing, but some objects were observed in the same period mainly by B. Warner, allowing us to confirm or improve the existing results. To plan the runs and select the targets, we developed the public Long Planning tool in PHP. For preliminary data reduction and rapid follow-up planning we developed the LiDAS pipeline in Python and IRAF. For final data reduction, flux calibration, night linkage and Fourier fitting, we used mainly MPO Canopus. Periods of 18 targets are presented for the first time, and we could solve or constrain rotation for 16 of them. We secured periods for 45 targets ($$U\sim 3$$U∼3), found candidate periods for other 16 targets ($$U\sim 2$$U∼2), and we propose tentative periods for other 32 targets ($$U\sim 1$$U∼1). We observed 7 known or candidate binary NEAs, fiting 3 of them (2102 Tantalus, 5143 Heracles and 68348). We observed 8 known or candidate tumbling NEAs, deriving primary periods for 3 objects (9400, 242708 and 470510). We evidenced rapid oscillations (few minutes) and could fit fast tentative periods TP2 for 5 large newly suggested tumbling or binary candidates (27346, 112985, 285625, 377732, 408980), probably discovering at least one new binary NEA (2011 WO41). We resolved periods of 4 special objects which include two proposed space mission targets (163249 and 101955 Bennu), one very fast rotator NEA discovered by EURONEAR (2014 NL52) and the “Halloween asteroid” (2015 TB145). Using Mercator in simultaneous 3 band MAIA imaging, we could evidence for the first time clear variation in the color lightcurves of 10 NEAs. The periods derived from the g–r color lightcurves are found to match individual band period fits for 4 NEAs (27346, 86067, 112985 and 275976).

中文翻译:

EURONEAR 近地小行星光曲线调查

这份数据文件展示了 101 颗近地小行星 (NEA) 的光变曲线,这些小行星大多在 2014 年至 2017 年间观测到,作为 EURONEAR 光度测量的一部分,使用位于西班牙、智利、斯洛伐克和罗马尼亚的 11 台直径在 0.4 至 4.2 m 之间的望远镜。大部分目标在观测时还没有公开数据,但部分天体主要由 B. Warner 在同一时期观测到,使我们能够确认或改进现有结果。为了规划运行并选择目标,我们开发了 PHP 公共长期规划工具。为了初步数据缩减和快速跟进计划,我们在 Python 和 IRAF 中开发了 LiDAS 管道。对于最终数据缩减、通量校准、夜间链接和傅立叶拟合,我们主要使用 MPO Canopus。18个目标时段首次呈现,我们可以解决或限制其中 16 个的旋转。我们为 45 个目标($$U\sim 3$$U∼3)确定了期限,为其他 16 个目标($$U\sim 2$$U∼2)找到了候选期限,并为其他 32 个目标提出了暂定期限($$U\sim 1$$U∼1)。我们观察到 7 个已知或候选的二元 NEA,适合其中的 3 个(2102 Tantalus、5143 Heracles 和 68348)。我们观察到 8 个已知或候选的翻滚 NEA,推导出 3 个天体(9400、242708 和 470510)的主要周期。我们证明了快速振荡(几分钟),并且可以为 5 个新建议的大翻滚或二元候选(27346、112985、285625、377732、408980)拟合快速暂定期 TP2,可能发现至少一个新的二元 NEA(2011 WO41)。我们解决了 4 个特殊物体的周期,其中包括两个提议的太空任务目标(163249 和 101955 Bennu),EURONEAR (2014 NL52) 和“万圣节小行星” (2015 TB145) 发现的一个非常快的旋转体 NEA。在同步 3 波段 MAIA 成像中使用墨卡托,我们可以首次证明 10 个 NEA 的颜色光曲线的明显变化。发现从 g-r 颜色光曲线得出的周期与 4 个 NEA(27346、86067、112985 和 275976)的单个波段周期拟合相匹配。
更新日期:2017-07-20
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