Solar System
Dynamics &
Planetology
Group 		C/2002 E2 Snyder-Murakami


SSDP Cometary Note C2002E2N1-001

Comet C/2002 E2 Snyder-Murakami

number of observations 941
number of residuals 1863
data interval 2002 Mar. 8 — 2003 Jan. 8
rms [arcsec] 0.57
orbit quality class 1b

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 20020215.0 = JD 2452320.5
time of perihelion passage (TT) 20020221.798122 ± 0.000269
perihelion distance 1.46645893 ± 0.00000133
eccentricity 1.00076303 ± 0.00001166
argument of perihelion [deg] 9.038271 ± 0.000227
longitude of the ascending node [deg] 244.583534 ± 0.000030
inclination [deg] 92.545707 ± 0.000012
inverse semimajor axis [10-6 au-1] -520.32 ± 7.95

Nongravitational parameters [10-8 au/day2] A1 = 2.780 ± 0.232 A2 = 0.879 ± 0.194 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) 17020228
time of perihelion passage (TT) 20020221.797582 ± 0.000761
perihelion distance 1.47022961 ± 0.00000456
eccentricity 0.99986829 ± 0.00001822
argument of perihelion [deg] 9.055695 ± 0.000626
longitude of the ascending node [deg] 244.655045 ± 0.000030
inclination [deg] 92.551268 ± 0.000011
inverse semimajor axis [10-6 au-1] 89.59 ± 12.39

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) 22960414
time of perihelion passage (TT) 20020222.046158 ± 0.000226
perihelion distance 1.46932103 ± 0.00000117
eccentricity 1.00064899 ± 0.00000410
argument of perihelion [deg] 9.082564 ± 0.000082
longitude of the ascending node [deg] 244.579630 ± 0.000030
inclination [deg] 92.493100 ± 0.000011
inverse semimajor axis [10-6 au-1] -441.69 ± 2.79


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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