由恒星掩星得出的 (486958) Arrokoth 的大小与形状约束
地球与行星天体物理
2020-04-08 v1 天体物理仪器与方法
摘要
我们呈现了四次由 (486958) Arrokoth（新视野号扩展任务的飞掠目标）引起的恒星掩星结果。四次努力中的三次对天体给出了正面探测，且全部约束了环与其他碎屑的存在，未发现任何此类物质。2017年6月3日部署了25个移动观测站并得到固定望远镜增补，此次努力未获正面探测。2017年7月10日事件由SOFIA观测，得到一条极短弦。2017年7月17日部署的24个观测站给出了五条弦，清晰显示出与接触双星一致的复杂形状，整体轮廓粗略尺寸为20×30 km。由这些数据推导出10%的可见反照率。2018年8月4日第四次事件部署了22套系统，得到两条弦。掩星数据与飞掠结果的结合显著精化了自转周期，现估计为15.9380 0.0005 小时。掩星数据还提供了关于该天体位置的高精度天体测量约束，对支持新视野号飞掠导航至关重要。本工作展示了一种获取遥远柯伊伯带天体详细大小与形状信息并探测环与尘埃的有效方法，同时也是尤其对小型遥远天体有用的、可辅助航天器导航的位置数据重要来源。
引用
@article{arxiv.2001.00125,
title = {Size and Shape Constraints of (486958) Arrokoth from Stellar Occultations},
author = {Marc W. Buie and Simon B. Porter and Peter Tamblyn and Dirk Terrell and Alex Harrison Parker and David Baratoux and Maram Kaire and Rodrigo Leiva and Anne J. Verbiscer and Amanda M. Zangari and François Colas and Baïdy Demba Diop and Joseph I. Samaniego and Lawrence H. Wasserman and Susan D. Benecchi and Amir Caspi and Stephen Gwyn and J. J. Kavelaars and Adriana C. Ocampo Uría and Jorge Rabassa and M. F. Skrutskie and Alejandro Soto and Paolo Tanga and Eliot F. Young and S. Alan Stern and Bridget C. Andersen and Mauricio E. Arango Pérez and Anicia Arredondo and Rodolfo Alfredo Artola and Abdoulaye Bâ and Romuald Ballet and Ted Blank and Cheikh Tidiane Bop and Amanda S. Bosh and Matías Aarón Camino López and Christian M. Carter and J. H. Castro-Chacón and Alfonso Caycedo Desprez and Nicolás Caycedo Guerra and Steven J. Conard and Jean-Luc Dauvergne and Bryan Dean and Michelle Dean and Josselin Desmars and Abdou Lahat Dieng and Mame Diarra Bousso Dieng and Omar Diouf and Gualbert Séraphin Dorego and David W. Dunham and Joan Dunham and Hugo A. Durantini Luca and Patrick Edwards and Nicolas Erasmus and Gayane Faye and Mactar Faye and Lucas Ezequiel Ferrario and Chelsea L. Ferrell and Tiffany J. Finley and Wesley C. Fraser and Alison J. Friedli and Julián Galvez Serna and Esteban A. Garcia-Migani and Anja Genade and Kai Getrost and Ricardo A. Gil-Hutton and German N. Gimeno and Eli Joseph Golub and Giovanni Francisco González Murillo and Michael D. Grusin and Sebastian Gurovich and William H. Hanna and Santiago M. Henn and P. C. Hinton and Paul J. Hughes and John David Josephs and Raul Joya and Joshua A. Kammer and Brian A. Keeney and John M. Keller and Emily A. Kramer and Stephen E. Levine and Carey M. Lisse and Amy J. Lovell and Jason A. Mackie and Stanislav Makarchuk and Luis E. Manzano and Salma Sylla Mbaye and Modou Mbaye and Raul Roberto Melia and Freddy Moreno and Sean K. Moss and Diene Ndaiye and Mapathe Ndiaye and Matthew J. Nelson and Catherine B. Olkin and Aart M. Olsen and Victor Jonathan Ospina Moreno and Jay M. Pasachoff and Mariana Belen Pereyra and Michael J. Person and Giovanni Pinzón and Eduardo Alejandro Pulver and Edwin A. Quintero and Jeffrey R. Regester and Aaron Caleb Resnick and Mauricio Reyes-Ruiz and Alex D. Rolfsmeier and Trina R. Ruhland and Julien Salmon and Pablo Santos-Sanz and Marcos Ariel Santucho and Diana Karina Sepúlveda Niño and Amanda A. Sickafoose and José S. Silva and Kelsi N. Singer and Joy N. Skipper and Stephen M. Slivan and Rose J. C. Smith and Julio C. Spagnotto and Andrew W. Stephens and Samuel D. Strabala and Francisco J. Tamayo and Henry B. Throop and Andrés David Torres Cañas and Labaly Toure and Alassane Traore and Constantine C. C. Tsang and Jake D. Turner and Santiago Vanegas and Roger Venable and John C. Wilson and Carlos A. Zuluaga and Jorge I. Zuluaga},
journal= {arXiv preprint arXiv:2001.00125},
year = {2020}
}
备注
Submitted to Astronomical Journal (revised); 40 pages, 13 figures, 9 tables