Impulse Effects on the Orbit of 1987 Quadrantid Swarm

Details Impulse Effects on the Orbit of 1987 Quadrantid Swarm Impulse Effects on the Orbit of 1987 Quadrantid Swarm

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..477o&link_type=abstract

Publications of the Astronomical Society of Japan, v.47, p.477-486.

Astronomy and Astrophysics

Astronomy

4

Interplanetary Medium, Meteors, Solar System: General

Scientific paper

We derived direct evidence of the impulse effects on the Quadrantid meteor swarm by analysing the photographic orbital data along with performing backward numerical integrations. The standard Quadrantids, being observed in average years, have scarcely changed in the orbital elements during the past several decades. However, the orbit of the 1987 Quadrantid swarm was significantly different from those of the standard Quadrantids. The right ascension and declination of the radiant were less by 2(deg) --3(deg) and greater by 0.5(deg) --1(deg) , respectively, and the argument of the perihelion was consequently greater by 4(deg) --5(deg) . Our numerical integrations indicate that the 1987 Quadrantids was strongly perturbed by a close encounter with Jupiter up to 0.28 AU in 1984 late August, when it occurred at about a half orbital period before the observation. We conclude that the peculiar orbit of the 1987 Quadrantids should be due to the impulse effect of the Jovian perturbation. The orbital evolution of the 1987 Quadrantids before the impulse effect is also discussed in this paper.

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