The variation of short-period comet size and decay rate with perihelion distance

Details The variation of short-period comet size and decay rate with perihelion distance The variation of short-period comet size and decay rate with perihelion distance

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.346..584h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 346, Issue 2, pp. 584-592.

Astronomy and Astrophysics

Astronomy

7

Comets: General

Scientific paper

Out of over 200 known short-period comets, we analyse a self-consistent list of 105 comets which have accurately estimated nuclei radii. It is found that both the median size and the size distribution index of these comets vary as a function of the perihelion distance, q, of the cometary orbit. A value of q~ 2.7 au divides the comets into an outer solar system group which are hardly affected by decay, and an inner solar system group which are decaying quickly. It is estimated that 10, 20 and 30 per cent of the 105 comets will have decayed away after 1000, 2000 and 3000 yr, respectively.

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