Issue |
A&A
Volume 448, Number 3, March IV 2006
|
|
---|---|---|
Page(s) | 1191 - 1196 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361:20053492 | |
Published online | 03 March 2006 |
The quasi-Hilda subgroup of ecliptic comets – an update
Konkoly Observatory, Budapest 1525, PO Box 67, Hungary e-mail: tothi@konkoly.hu
Received:
23
May
2005
Accepted:
10
November
2005
Context.
The importance of the Hilda zone is obvious in the main belt asteroid –
ecliptic comet relationship.
Aims.
The inventory of the quasi-Hilda comet group is updated by taking into account
the data bases of new discoveries performed by large survey programs.
Methods.
We examined the Hilda zone objects according to their
Tisserand parameter with respect to Jupiter, orbital excitation
parameter, as well as their distribution in the Langrangian orbital
elements space.
Results.
We found 11 new members of the quasi-Hilda cometary subgroup of ecliptic
comets, so that altogether there are now 15 known comets in the Hilda
asteroid zone.
In addition, we found 23 outliers of the Hilda family in the
Lagrangian orbital elements space, which can be dormant or extinct
comet nuclei.
This proposition should be checked by both observations of the physical
properties and investigation of the long-term evolution of the orbits
of these objects.
© ESO, 2006
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