论文标题
来自掩星的小行星的精确天文统计和直径 - 观测数据及其解释的数据集
Precise astrometry and diameters of asteroids from occultations -- a data-set of observations and their interpretation
论文作者
论文摘要
自1961年以来，已经观察到小行星的恒星掩体，从少数增加到现在每年超过500。我们已经创建并定期维护5,000多个观察到的小行星掩星的数据集。数据集包括：原始观测值；基于质量或数字中心（不照明）的1 MAS水平的天文统计；在可能的情况下，小行星的直径至5公里或更高，并适合塑造模型；小行星卫星的分离和直径；典型的分离在MAS或更少的情况下，并发现了双星的发现。数据集发表在NASA的行星数据系统上，并定期更新。我们在这里提供了数据集的概述，讨论与确定天体和直径相关的问题，并提供示例，说明可以从数据集中得出的问题。我们还比较了小行星的螺型直径与卫星Neowise，Akari Acua和Iras测得的直径，并表明最好的卫星确定直径是所有三个卫星的直径的组合。
Occultations of stars by asteroids have been observed since 1961, increasing from a very small number to now over 500 annually. We have created and regularly maintain a growing data-set of more than 5,000 observed asteroidal occultations. The data-set includes: the raw observations; astrometry at the 1 mas level based on centre of mass or figure (not illumination); where possible the asteroid's diameter to 5 km or better, and fits to shape models; the separation and diameters of asteroidal satellites; and double star discoveries with typical separations being in the tens of mas or less. The data-set is published at NASA's Planetary Data System and is regularly updated. We provide here an overview of the data-set, discuss the issues associated with determining the astrometry and diameters, and give examples of what can be derived from the data-set. We also compare the occultation diameters of asteroids with the diameters measured by the satellites NEOWISE, AKARI AcuA, and IRAS, and show that the best satellite-determined diameter is a combination of the diameters from all three satellites.
