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
detectability of NG effects in the comet's motion comet with determinable NG~orbit
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 1863
RMS [arcseconds] 0.61
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 2002 02 15
perihelion date 2002 02 21.79507568 ± 0.00009176
perihelion distance [au] 1.46645029 ± 0.00000080
eccentricity 1.00083134 ± 0.00000331
argument of perihelion [°] 9.035554 ± 0.000071
ascending node [°] 244.583510 ± 0.000025
inclination [°] 92.54567 ± 0.000011
recip semi-major axis [10-6 au-1] -566.91 ± 2.26
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.