C/2002 E2 Snyder-Murakami
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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
previous orbit elements (barycentric ecliptic J2000)
no. of returning VCs in the swarm 5001 *
no. of escaping VCs in the swarm 0
no. of hyperbolas among escaping VCs in the swarm 0
previous recip semi-major axis [10-6 au-1] 89.69 ± 12.28
previous perihelion distance [au] 1.279 – 3.161 – 7.253
previous aphelion distance [103 au] 18.9 – 22.3 – 27
time interval to previous perihelion [Myr] 0.917 – 1.175 – 1.563
percentage of VCs with q < 1097
percentage of VCs with 10 < q < 203
dynamical status definitely dynamically old (DO+)
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On stellar perturbations
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.