Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011an....332..676b&link_type=abstract
Astronomische Nachrichten, Vol.332, Issue 7, p.676
Astronomy and Astrophysics
Astronomy
Comets: General, Comets: Individual (C/1857 D1)
Scientific paper
Comet C/ 1857 D1 (d'Arrest) is one of a large number of comets with parabolic orbits. Given that there are sufficient observations of the comet, 299 in right ascension and 279 in declination, it proves possible to calculate a better orbit. The calculations are based on a 12th order predictor-corrector method. The comet's orbit is highly elliptical, e=0.99982 and, from calculated mean errors, statistically different from a parabola. The comet will not return for at least 44 000 years and thus represents no immediate NEO threat.
Branham
L. Jr. R.
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