Open AccessThe origin of the June Bootid outburst in 1998 and determination of cometary ejection velocities
Author(s) -
Asher D. J.,
Emel'yanenko V. V.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05164.x
Subject(s) - meteoroid , physics , meteor (satellite) , meteor shower , comet , astrophysics , astronomy , asteroid , jupiter (rocket family) , space shuttle
Numerical integrations are used to show that the main contribution to the outburst observed in the June Bootid meteor shower in 1998 was a subset of meteoroids released from the parent comet, 7P/Pons–Winnecke, at its 1825 return. A substantial part of the June Bootid stream is in 2:1 resonance with Jupiter. This inhibits chaotic motion, allowing structures in the stream to remain compact enough over centuries that meteor outbursts can still be produced. Circumstances of ejection in 1825 are calculated that exactly result in orbits capable of producing meteors at the observed time in 1998. Required ejection velocities are 10–20 m s ‐1 .