C/2005 Q1 LINEAR
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C/2005 Q1 was discovered on 27 August 2005 by the LINEAR as an apparently asteroidal object. At once its cometary apperance was reported by several observers [IAUC 8590, 2005 August 29]. At the moment of discovery, it was two days after perihelion passage.
This comet made its closest approaches to the Earth on 16 December 2004 (5.739 au, 8 months before perihelion passage) and 23 November 2005 (5.856 au, 3 months after perihelion).
Solution given here is based on data spanning over 2.1 yr in a range of heliocentric distances from 6.41 au to 8.25 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 161
data interval 2005 08 27 – 2007 10 16
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 6.41 au – 8.25au
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 309
RMS [arcseconds] 0.48
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2005 08 18
perihelion date 2005 08 25.52948300 ± 0.00355400
perihelion distance [au] 6.40841016 ± 0.00001266
eccentricity 1.00447731 ± 0.00001322
argument of perihelion [°] 44.691595 ± 0.000311
ascending node [°] 87.727459 ± 0.000045
inclination [°] 105.188309 ± 0.000033
recip semi-major axis [10-6 au-1] -698.66 ± 2.06
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