C/2006 X1 LINEAR
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Comet C/2006 X1 was discovered nine months after perihelion passage and next observed 66 days (0.18 yr) in a narrow range of heliocentric distances from 6.43 au to 6.58 au.
Comet had its closest approaches to the Earth on 6 September 2005 (5.553 au. 7 months before perihelion passage) and on 12 October 2006 (5.535 au, two months before discovery).
This comet suffers small planetary perturbations during its passage through the planetary system; however, they could lead to escape of the comet from the solar system on hiperbolic orbit (see future barycentric orbit).
See also Królikowska and Dybczyński 2017.

solution description
number of observations 96
data interval 2006 12 11 – 2007 02 15
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 6.43 au – 6.58au
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 185
RMS [arcseconds] 0.39
orbit quality class 2b
orbital elements (heliocentric ecliptic J2000)
Epoch 2006 12 11
perihelion date 2006 03 05.64280635 ± 0.36220668
perihelion distance [au] 6.12558539 ± 0.00108144
eccentricity 0.99939905 ± 0.00025141
argument of perihelion [°] 101.275279 ± 0.037106
ascending node [°] 255.247320 ± 0.004037
inclination [°] 42.615407 ± 0.001975
recip semi-major axis [10-6 au-1] 98.10 ± 41.06
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