Solar System
Dynamics &
Planetology
Group 		C/1997 J2 Meunier-Dupouy


SSDP Cometary Note C1997J2N1-001

Comet C/1997 J2 Meunier-Dupouy

number of observations 1446
number of residuals 2863
data interval 1997 May 5 — 1999 Oct. 9
rms [arcsec] 0.53
orbit quality class 1a+

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19980308.0 = JD 2450880.5
time of perihelion passage (TT) 19980310.442478 ± 0.000111
perihelion distance 3.05109435 ± 0.00000118
eccentricity 1.00056658 ± 0.00000179
argument of perihelion [deg] 122.674220 ± 0.000028
longitude of the ascending node [deg] 148.844627 ± 0.000006
inclination [deg] 91.273390 ± 0.000006
inverse semimajor axis [10-6 au-1] -185.70 ± 0.59

Nongravitational parameters [10-8 au/day2] A1 = 292.74 ± 6.92 A2 = -50.39 ± 6.35 A3 = 0.0 (assumed)

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) 16951201
time of perihelion passage (TT) 19980311.421737 ± 0.000238
perihelion distance 3.05072071 ± 0.00000159
eccentricity 0.99986383 ± 0.00000270
argument of perihelion [deg] 122.719964 ± 0.000065
longitude of the ascending node [deg] 148.795626 ± 0.000006
inclination [deg] 91.242267 ± 0.000005
inverse semimajor axis [10-6 au-1] 44.64 ± 0.88

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) 23000213
time of perihelion passage (TT) 19980311.767612 ± 0.000292
perihelion distance 3.03930973 ± 0.00000168
eccentricity 0.99995526 ± 0.00000277
argument of perihelion [deg] 122.507863 ± 0.000075
longitude of the ascending node [deg] 148.804024 ± 0.000006
inclination [deg] 91.253220 ± 0.000005
inverse semimajor axis [10-6 au-1] 14.72 ± 0.91


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.





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