Solar System
Dynamics &
Planetology
Group 		C/1999 Y1 LINEAR


SSDP Cometary Note C1999Y1N2-001

Comet C/1999 Y1 LINEAR

number of observations 884
number of residuals 1749
data interval 1999 Oct. 29 — 2003 July 19
rms [arcsec] 0.48
orbit quality class 1a+

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 20010401.0 = JD 2452000.5
time of perihelion passage (TT) 20010324.103143 ± 0.000123
perihelion distance 3.09119483 ± 0.00000131
eccentricity 1.00059789 ± 0.00000265
argument of perihelion [deg] 184.283022 ± 0.000029
longitude of the ascending node [deg] 188.883981 ± 0.000012
inclination [deg] 134.786955 ± 0.000012
inverse semimajor axis [10-6 au-1] -193.42 ± 0.86

Nongravitational parameters [10-8 au/day2] A1 = 296.45 ± 7.64 A2 = 48.9 ± 10.4 A3 = 5.31 ± 3.40

Notes: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.

Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 16981115
time of perihelion passage (TT) 20010324.030859 ± 0.000210
perihelion distance 3.08406653 ± 0.00000163
eccentricity 0.99985392 ± 0.00000290
argument of perihelion [deg] 184.263825 ± 0.000051
longitude of the ascending node [deg] 188.750285 ± 0.000014
inclination [deg] 134.797953 ± 0.000010
inverse semimajor axis [10-6 au-1] 47.37 ± 0.94

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. before entering the planetary zone.

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT) 23070217
time of perihelion passage (TT) 20010323.059698 ± 0.000391
perihelion distance 3.08855418 ± 0.00000184
eccentricity 0.99893231 ± 0.00000450
argument of perihelion [deg] 184.115809 ± 0.000082
longitude of the ascending node [deg] 188.858728 ± 0.000016
inclination [deg] 134.822356 ± 0.000023
inverse semimajor axis [10-6 au-1] 345.69 ± 1.46


Future barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here   (data format), i.e. after leaving the planetary zone.





Solar System Dynamics & Planetology Group, 2013. All rights reserved

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