| Issue |
A&A
Volume 427, Number 3, December I 2004
|
|
|---|---|---|
| Page(s) | 1117 - 1126 | |
| Section | Celestial mechanics and astrometry | |
| DOI | https://doi.org/10.1051/0004-6361:20041339 | |
| Published online | 16 November 2004 | |
Long-period comets with non-gravitational effects *
Space Research Centre of the Polish Academy of Sciences, Bartycka 18A, 00-716, Warsaw, Poland e-mail: mkr@cbk.waw.pl
Received:
24
May
2004
Accepted:
24
June
2004
The influence of non-gravitational effects on the
motion of long-period comets is analyzed. Investigations were
performed for about 60 nearly-parabolic comets discovered during
the last thirty years. All three non-gravitational parameters 
were detected in the motion
of 19 comets on the basis of positional observations only. For
these comets the standard g(r) function as well as some of its
modifications were used to model the ice sublimation from the
cometary nucleus. For 14 of 19 comets the orientation of spin axes
of the nucleus were also determined. Finally, the magnitude of the
non-gravitational effects derived for the long-period comets have
been compared with observed the non-gravitational perturbations on
periodic comets.
Key words: solar system: general / comets: general
© ESO, 2004
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