Hilda asteroids among Jupiter family comets

Details Hilda asteroids among Jupiter family comets Hilda asteroids among Jupiter family comets

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005icar..174...81d&link_type=abstract

Icarus, Volume 174, Issue 1, p. 81-89.

Other

8

Scientific paper

Hilda asteroids and comets are similar from the compositional point of view. The D-taxonomic class prevailing among Hildas has all the characteristics found in cometary spectra. Jupiter Family Comets (JFCs) coming from the trans-neptunian region are under the gravitational control of Jupiter, making them a dynamically unstable population with a mean dynamical lifetime of 104 to 10 years. In contrast, Hilda asteroids residing in the 3:2 mean motion resonance with Jupiter are a very stable population. But once they escape from the resonance, they are dynamically controlled by Jupiter, and in this sense their behavior resembles that of JFC. We performed a numerical simulation to analyze the dynamical evolution that Hildas follow after escaping from the resonance, and their contribution to the JFC population. We found that 8% of the particles leaving the resonance end up impacting Jupiter. 98.7% of the escaped Hildas live at least 1000 years as a JFC, with a mean lifetime of 1.4×10 years. In particular, escaped Hildas stay mainly in the region of perihelion distances greater than 2.5 AU. On the other hand, the number of escaped Hildas reaching the inner Solar System (q<2.5 AU) is negligible. So, there are almost no Hilda asteroids among the NEO population. We also analyzed the possibility that the Shoemaker Levy 9 were an escaped Hilda asteroid. In this case, it would be possible to give stronger constraints to its pre-capture orbital elements.

Affiliated with

Also associated with

No associations

Rating

Hilda asteroids among Jupiter family comets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hilda asteroids among Jupiter family comets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hilda asteroids among Jupiter family comets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1218897