C/2006 E1 McNaught
more info
C/2006 E1 was discovered on 11 March 2006 by Robert H. McNaught on the Siding Spring Survey images taken with the 0.5-m Uppsala Schmidt telescope [IAUC 8688, 2006 March 16]. After perihelion passage in January 2007, it was ocassionally observed starting from 26 January 2008 until 3 March 2009 (see figure).
This comet made its closest approach to the Earth on 3 July 2006 (5.382 au), six months before perihelion.
Solution given here is based on data spanning over 3.0 yr in a range of heliocentric distances: 6.39 au – 6.041 au (perihelion) – 8.07 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to escape of the comet from the solar system on hiperbolic orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 143
data interval 2006 03 11 – 2009 03 03
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 6.39 au – 6.04 au (perihelion) – 8.07 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 282
RMS [arcseconds] 0.65
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2007 01 20
perihelion date 2007 01 06.50743600 ± 0.00277000
perihelion distance [au] 6.04057919 ± 0.00001081
eccentricity 1.00121653 ± 0.00001344
argument of perihelion [°] 232.779293 ± 0.000228
ascending node [°] 95.034571 ± 0.000037
inclination [°] 83.193442 ± 0.000049
recip semi-major axis [10-6 au-1] -201.39 ± 2.22
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