C/2001 C1 LINEAR
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C/2001 C1 was discovered on 1 February 2001 by the LINEAR [IAUC 7578, 2001 February 2]. Later, Syuichi Nakano linked this comet with an asteroid 2000 HR81 detected by LONEOS on 29 April 2000 [MPEC 2001-H23, 2001 April 21].
This comet made its closest approach to the Earth on 7 May 2002 (4.410 au), 1.3 months after perihelion.
Solution given here is based on data spanning over 2.2 yr in a range of heliocentric distances: 7.24 au – 5.105 au (perihelion) – 5.16 au.
This Oort spike comet suffers rather 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 223
data interval 2000 04 29 – 2002 07 03
data type significantly more measurements before perihelion (PRE+)
data arc selection entire data set (STD)
range of heliocentric distances 7.24 au – 5.11 au (perihelion) – 5.16 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 436
RMS [arcseconds] 0.67
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2002 03 27
perihelion date 2002 03 28.29295600 ± 0.00241300
perihelion distance [au] 5.10462770 ± 0.00001150
eccentricity 0.99991178 ± 0.00001068
argument of perihelion [°] 219.936408 ± 0.000274
ascending node [°] 33.711279 ± 0.000013
inclination [°] 68.95192 ± 0.00005
recip semi-major axis [10-6 au-1] 17.28 ± 2.09
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