C/2002 E2 Snyder-Murakami
more info
Comet C/2002 E2 was discovered on 11 March 2002 by Douglas Snyder (Arizona, US) and Shigeki Murakami (Niigata, Japan), that is about 3 weeks after its perihelion passage. Some earlier images of this comet were next found in Klet Observatory (Czech Republic), Ondřejov Observatory (Czech Republic) and Saku Observatory (Japan), expanding data-arc back in time to 8 March. It was observed until 8 January 2003.
Comet had its closest approach to the Earth on 8 April 2002 (1.367 au), less than a month after discovery.
Solutions given here are based on data spanning over 0.827 yr in a range of heliocentric distances from 1.48 au to 4.18 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
See also Królikowska 2014.

solution description
number of observations 940
data interval 2002 03 08 – 2003 01 08
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 1.48 au – 4.18au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 1863
RMS [arcseconds] 0.57
orbit quality class 1b
orbital elements (barycentric ecliptic J2000)
Epoch 2296 04 14
perihelion date 2002 02 22.04615751 ± 0.00022619
perihelion distance [au] 1.46932103 ± 0.00000117
eccentricity 1.00064899 ± 0.00000410
argument of perihelion [°] 9.082564 ± 0.000082
ascending node [°] 244.579630 ± 0.000030
inclination [°] 92.4931 ± 0.000011
recip semi-major axis [10-6 au-1] -441.69 ± 2.79
file containing 5001 VCs swarm
Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line — the moment of perihelion passage.
Six 2D-projections of the 6D space of future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.