C/2000 CT54 LINEAR
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C/2000 CT54 was discovered on 2 February 2000 by LINEAR Survey as apparently asteroidal object. At once, its cometary apperance was reported [IAUC 7368, 2000 February 18]. Later, pre-discovery detections from 28 January 2000 (LINEAR data) and 21 March 1999 (Sloan Digital Sky Survey) were found.
This comet made its closest approach to the Earth on 29 July 2001 (2.606 au), 40 days after perihelion.
Solutions given here are based on data spanning over 4.8 yr in a range of heliocentric distances: 7.72 au – 3.156 au (perihelion) – 8.52 au.
This Oort spike comet suffers rather strong planetary perturbations during its passage through the planetary system that lead to notable more tight future orbit with semimajor axis shorter than 2000 au (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 210
data interval 1999 03 21 – 2004 01 17
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 7.72 au – 3.16 au (perihelion) – 8.52 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 417
RMS [arcseconds] 0.75
orbit quality class 1a+
previous orbit elements (barycentric ecliptic J2000)
no. of returning VCs in the swarm 5001 *
no. of escaping VCs in the swarm 0
no. of hyperbolas among escaping VCs in the swarm 0
previous recip semi-major axis [10-6 au-1] 72.82 ± 3.12
previous perihelion distance [au] 5.757 – 6.246 – 6.993
previous aphelion distance [103 au] 26.1 – 27.5 – 29.1
time interval to previous perihelion [Myr] 1.49 – 1.612 – 1.752
percentage of VCs with q < 10100
dynamical status definitely dynamically old (DO+)
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On stellar perturbations
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.