On the Problem of Searching
for Undiscovered Cometary Families Colliding
with Terrestrial Type Planets
N. I. Perov, D. V. Kolesnikov
Yaroslavl State Pedagogical University, Yaroslavl, Russia
Abstract:
The process of the transition of a comet nucleus from an initial
heliocentric parabolic orbit into a heliocentric elliptical
(parabolic with different parameters or hyperbolic) trajectory
is investigated in terms of a pairwise three dimensional
two-body problem: the Sun – comet nucleus and terrestrial planet
comet
nucleus. Analytical formulas are reported for the orbital parameters
of a nucleus after its passing through the sphere of influence of
a terrestrial planet. It should be noted that the new minimal values
of the orbital periods of the nuclei Ρmin are within
the limits 10-104
years (Ρmin for "families" of comets of Mercury, Venus, Earth, and Mars
is equal to 10130, 34, 19, 632 tropical years, respectively). The angles
between directions "the Earth - the Sun" and "the Earth - the planet
(Mercury, Venus)", corresponding to the epochs of collisions of the comet
nuclei with the Earth (or epochs of appearance of new meteor streams
associated with existing or disintegrated comet nuclei) are determined.
The bottleneck of revealing of such meteoroid complexes is concerned
with the small value of the corresponding impact parameter. The value
is on the order of magnitude of 10 % of the radius of the terrestrial
type planet (whereas for the giant planets it is equal to 10 radii).
Key words:
Very Long Baseline Interferometry (VLBI), Near Earth Objects (NEOs), cometary families,
terrestrial type planets, collidings, transition of a comet nucleus, initial
heliocentric parabolic orbit, heliocentric elliptical trajectory,
a pairwise three dimensional two-body problem, the Sun - comet nucleus,
terrestrial planet - comet nucleus, orbital parameters of a nucleus,
sphere of influence of a terrestrial planet, orbital periods of the nuclei,
"families" of comets, Mercury, Venus, Earth, Mars, tropical years,
angles between directions, "the Earth - the Sun" direction,
"the Earth - the planet" direction, epochs of collisions of the comet
nuclei with the Earth, epochs of appearance of new meteor streams,
existing or disintegrated comet nuclei, meteoroid complexes, impact
parameters, the magnitude, the radius of the terrestrial type planet,
giant planets.