Near-Earth asteroids among the Scorpiids meteoroid complex

Abstract

A group of near-Earth asteroids (NEAs) that moved on similar orbits to each other and where the orbits could be classed as cometary were identified by searching the "Near-Earth Objects Dynamic Site" database. Six NEAs were identified, 2003HP2, 2006WX29, 2007VH189, 2007WT3, 2007WY3, and 2008UM1. The orbits were integrated back over one complete cycle in the variation of the argument of perihelion to identify times when their nodal distance was 1 AU. Theoretical meteoroids were assumed to have been released at these times on an orbit identical to those of the NEAs. The characteristics of a meteor shower that would be formed when these meteoroids hit the Earth's atmosphere were calculated. It was found that the showers produced from all six NEAs were identical and could be recognized as the nighttime χ-and δ-Scorpiids and the daytime β-and σ-Librids, the latter two being named by us. It was also found that the orbital evolution of the Scorpiids was almost identical to the orbital evolution of the six NEAs. The similarity of the orbits, the nature of the orbit as cometary and the association of the Scorpiid meteoroid stream lead us to suggest that the origin of the whole complex was the fragmentation of some unknown comet several millennia ago.

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

“…At present, more than 40 NEAs are claimed to be associated with the Taurid complex, alongside comet 2P/Encke (Asher et al 1993;Porubčan et al 2004Porubčan et al , 2006Babadzhanov et al 2008a;Rudawska et al 2012a,b). Many other associations between asteroids and meteor showers have been identified, examples being Babadzhanov et al (2009Babadzhanov et al ( , 2012Babadzhanov et al ( , 2013Babadzhanov et al ( , 2015, Trigo-Rodrigues et al (2009), Madiedo et al (2013), Micheli et al (2016).…”

Meteoroid stream of 12P/Pons-Brooks, Decemberκ-Draconids, and Northern June Aquilids

“…It is beyond the scope of this paper to give a complete review of all relevant studies. We could describe here those by Wu & Williams (1992, 1993, Williams et al (2004b,a), Jones et al (2006), Porubčan et al (2006), Babadzhanov et al (2008), Jenniskens & Vaubaillon (2008), Wiegert et al (2009), Christou & Vaubaillon (2010), Williams & Ryabova (2011), Babadzhanov et al (2013), and other authors. A review of the techniques used for the modeling of meteoroid streams in the solar system was recently given by Vaubaillon et al (2015).…”

The August θ‐Aquillid fireballs and possible relationship with the asteroid 2004MB6

“…It was shown that such meteoroid streams as the Piscids, ι‐Aquariids, ν‐Virginids, and Scorpiids contain from one to several large NEAs of cometary origin, and these asteroid–meteoroid complexes are the result of a cometary break‐up (Babadzhanov et al. , , , ). Jenniskens () found that the NEA 2003EH1 has an orbit that matches the mean Quadrantid stream much better among any proposed candidate, and the conclusion further was strengthened by Babadzhanov et al.…”