Author:
Vida D.,Campbell-Brown M.,Brown P. G.,Egal A.,Mazur M. J.
Abstract
Context. Several authors predicted an outburst of the Draconid meteor shower in 2018, but with an uncertain level of activity.
Aims. Optical meteor observations were used to derive the population and mass indices, flux, and radiant positions of Draconid meteors.
Methods. We performed 90 min of multi-station observations after the predicted peak of activity using highly sensitive Electron Multiplying Charge Coupled Device cameras. The data calibration is discussed in detail. A novel maximum likelihood estimation method was developed to compute the population and mass index with robust error estimation. We applied the method to observed Draconids and used the values to derive the flux. Meteor trajectories were computed and compared to predicted radiant positions from meteoroid ejection models.
Results. We find a mass index of 1.74 ± 0.18 in the 30 min bin after the predicted peak, and 2.32 ± 0.27 in the subsequent 60 min. The location and the dispersion of the radiant are a good match to modeled values, but there is an offset of 0.4° in solar longitude.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
12 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献