Solar System
Dynamics &
Planetology
Group 		C/2008 T2 Cardinal


SSDP Cometary Note C2008T2A5-001

Comet C/2008 T2 Cardinal

number of observations 1345
number of residuals 2609
data interval 2008 Oct. 1 — 2009 Sep. 9
rms [arcsec] 0.38
orbit quality class 1b

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 20090213.0 = JD 2454875.5
time of perihelion passage (TT) 20090613.239633 ± 0.000046
perihelion distance 1.20221618 ± 0.00000061
eccentricity 1.00011611 ± 0.00000129
argument of perihelion [deg] 215.870786 ± 0.000038
longitude of the ascending node [deg] 309.678336 ± 0.000021
inclination [deg] 56.303838 ± 0.000015
inverse semimajor axis [10-6 au-1] -96.58 ± 1.07

Notes: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.
Non-gravitational (NG) solution gives a negative normal component of NG acceleration (negative parameter A1) what makes NG solution rather uncertain. More details in Królikowska and Dybczyński, 2013.

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

Epoch (TT) 17101019
time of perihelion passage (TT) 20090613.071253 ± 0.000044
perihelion distance 1.20556870 ± 0.00000062
eccentricity 0.99998527 ± 0.00000128
argument of perihelion [deg] 215.823242 ± 0.000038
longitude of the ascending node [deg] 309.716794 ± 0.000021
inclination [deg] 56.285125 ± 0.000015
inverse semimajor axis [10-6 au-1] 12.22 ± 1.06

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) 23110303
time of perihelion passage (TT) 20090614.090690 ± 0.000051
perihelion distance 1.20126774 ± 0.00000063
eccentricity 0.99966855 ± 0.00000128
argument of perihelion [deg] 215.842430 ± 0.000038
longitude of the ascending node [deg] 309.656118 ± 0.000021
inclination [deg] 56.291580 ± 0.000015
inverse semimajor axis [10-6 au-1] 275.92 ± 1.06


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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