The lifetimes and disappearance of long-period comets

Details The lifetimes and disappearance of long-period comets The lifetimes and disappearance of long-period comets

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984baicz..35..129k&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 35, no. 3, 1984, p. 129-150.

Astronomy and Astrophysics

Astronomy

2

Comets, Orbital Lifetime, Perihelions, Anomalies, Extinction, Light Curve, Long Term Effects, Mass Distribution, Orbital Elements, Statistical Tests

Scientific paper

The relationship between the perihelion distance (q) and lifetime of comets is investigated statistically in 410 long-period comets observed since 1840 from the list of Marsden (1982). The results are presented in graphs and tables and discussed in comparison with the short-period results of Kresak (1981). The disappearance of eight objects is attributed to their extinction, and the rate of aging is found to be proportional to the inverse square root of q (the mean active lifetime in revolutions being equal to 20 times sq rt q), in agreement with the short-period data. A broad distribution of lifetimes about the mean is suggested by the fact that a comet is more likely to become extinct during its first two perihelion passages. The fading of comets prior to their extinction is found to be too rapid to be explained by simple progressive-ablation models.

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