本帖最后由 suhuasky 于 2015-4-12 16:14 编辑
Maik MeyerToday at 12:35 AM
Hello all,
Sergei wrote:
> The orbital period shrinks to ~60 years now.
Indeed, the comet seems to be of intermediate period in the range of 65 +- 10
years. Defintely not parabolic, the deviation from such a restricted orbit are too
large.
I see only C/1449 Y1 (and maybe the comet of 1362) as a possible match, but the
differences in node and peri are too large. The current orbit puts it about 3-5
degrees from the positions recorded in 1449/50. This is too large, even for the
comparably crude positions recorded then.
Cheers, Maik
La marche de la comète de 1449 (C/1449 Y1) observée par Toscanelli (1397-1482) à Florence. Ce croquis de travail est à comparer avec les planches plus élaborées du "Theatrum Cometicum" de Stanislaw Lubieniecki.
C/1449 Y1
Closest to the Earth: 1450 January 26 (0.5035 AU)
Computer T AOP AN (2000.0) i q e P
Hind 1449 Dec. 9 277 151 75 0.151 1.0 -----
Celoria 1449 Dec. 9.868 (UT) 356.691 268.809 155.679 0.32742 1.0 ----
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