Solar System
Dynamics &
Planetology
Group 		C/2006 L2 McNaught


SSDP Cometary Note C2006L2A5-001

Comet C/2006 L2 McNaught

number of observations 408
number of residuals 794
data interval 2006 June 14 — 2007 July 7
rms [arcsec] 0.49
orbit quality class 1a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 20061101.0 = JD 2454040.5
time of perihelion passage (TT) 20061120.199547 ± 0.000122
perihelion distance 1.99394772 ± 0.00000069
eccentricity 1.00093781 ± 0.00000284
argument of perihelion[deg] 48.034772 ± 0.000043
longitude of the ascending node [deg] 239.246068 ± 0.000012
inclination[deg] 101.022297 ± 0.000023
inverse semimajor axis [10-6 au-1] -470.33 ± 1.42

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) 17061114.0
time of perihelion passage (TT) 20061119.409644 ± 0.000117
perihelion distance 1.98559713 ± 0.00000069
eccentricity 0.99997441 ± 0.00000283
argument of perihelion[deg] 48.229422 ± 0.000042
longitude of the ascending node [deg] 239.260861 ± 0.000011
inclination[deg] 101.044452 ± 0.000023
inverse semimajor axis [10-6 au-1] 12.89 ± 1.43

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) 23050915.0
time of perihelion passage (TT) 20061119.940263 ± 0.000119
perihelion distance 1.99185210 ± 0.00000071
eccentricity 1.00018974 ± 0.00000284
argument of perihelion[deg] 47.969720 ± 0.000042
longitude of the ascending node [deg] 239.288007 ± 0.000011
inclination[deg] 101.012257 ± 0.000023
inverse semimajor axis [10-6 au-1] -95.26 ± 1.43


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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