C/2005 E2 McNaught
more info
Comet C/2005 E2 was discovered on 12 March 2005 by Robert H. McNaught (Siding Spring); that is about 11 months before its perihelion passage. It was observed until 3 March 2008 (see picture).
Comet had its closest approach to the Earth on 30 August 2005 (2.006 au), about 5.5 months after its discovery.
Solutions given here are based on data spanning over 2.98 yr in a range of heliocentric distances: 4.42 au – 1.582 au (perihelion) – 7.76 au.
This Oort spike comet suffers notable planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit with future eccentricity of 1.0040 (see future barycentric orbits).
See also Królikowska 2020

solution description
number of observations 1361
data interval 2005 03 12 – 2008 03 03
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 4.42 au – 1.52 au (perihelion) – 7.76 au
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 2697
RMS [arcseconds] 0.65
orbit quality class 1a+
orbital elements (barycentric ecliptic J2000)
Epoch 1706 11 14
perihelion date 2006 02 23.45787895 ± 0.00006375
perihelion distance [au] 1.52138709 ± 0.00000049
eccentricity 0.99996887 ± 0.00000116
argument of perihelion [°] 39.858835 ± 0.000033
ascending node [°] 347.977261 ± 0.000033
inclination [°] 16.989858 ± 0.000009
reciprocal semi-major axis [10-6 au-1] 20.46 ± 0.76
file containing 5001 VCs swarm
2005e2a5.bmi
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 original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.