Stream and sporadic meteoroids associated with near-Earth objects

Abstract

NEOs come close to the Earth's orbit so that any dust ejected from them, might be seen as a meteor shower. Orbits evolve rapidly, so that a similarity of orbits at one given time is not sufficient to prove a relationship, orbital evolution over a long time interval also has to be similar. Sporadic meteoroids can not be associated with a single parent body, they can only be classified as cometary or asteroidal. However, by considering one parameter criteria, many sporadics are not classified properly therefore two parameter approach was proposed.

Investigation into the relationship between comet 96P/Machholz 1 and asteroid 2003 EH1

“…The orbits are considered to be close if their value of D SH ≤ 0.20 (see e.g., Jenniskens 2006;Jopek & Williams 2013). In the absence of resonances, the semi-major axes of the orbits have no secular perturbations of the first order and can be considered constant:…”

“…A possible scenario here is that fragmentation of 96P/Machholz at various times produced C/1490 Y1 and (196256) 2003 EH1. The broad background in the Quadrantids is generated by normal comet activity while the fragmentation produced large amounts of new material as suggested by Jopek & Williams (2013).…”

“…The main aim of this work is to shed some light on this by investigating the evolution of the nominal orbits of both 96P/Machholz and (196256) 2003 EH1 in order to determine the point in time at which they were most similar to each other using standard methods described in Jopek & Williams (2013) for determining closeness of orbits.…”

IAU Meteor Data Center—the shower database: A status report

“…At the time of the Meteoroids 2013 meeting in Poznań the IAU MDC database stored the data of 579 showers (Jopek and Kaňuchová, 2014 In the time period between the last and the next GA IAU one can nominate a shower from the working list to become an established shower (its IAU numerical code appears with a green background in the list). The list of nominated candidates is discussed and completed shortly before the GA IAU and it is proposed for the approval by the adequate Commission during the GA IAU.…”

“…The Meteor Data Center shower database (MDC) came into being in 2007 (Jenniskens, 2008;Jopek and Jenniskens, 2011;Jopek and Kaňuchová, 2014) as a complement to the already existing orbital part of the IAU Meteor Data Center (Lindblad, 1987(Lindblad, , 1991Lindblad and Steel, 1994;Lindblad et al, 2003;Svoreň et al, 2008;Porubčan et al, 2011;Neslušan et al, 2014).…”