C/2000 OF8 Spacewatch
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Comet C/2000 OF8 was discovered on 24 July 2000 with Spacewatch Research project (Steward Observatory, Kitt Peak), that is a year before its perihelion passage. It was observed until 1 August 2001.
Preffered solution given here is based on pre-perihelion data spanning over 1.02 yr in a range of heliocentric distances from 4.56 au to 2.17 au.
Comet had its closest approach to the Earth on 4 June 2001 (1.390 au), about 2 months before perihelion passage.
This is Oort spike comet.
See also Sekanina 2019 and Królikowska 2020

solution description
number of observations 68
data interval 2000 07 24 – 2001 06 23
data arc selection data generally limited to pre-perihelion (PRE)
range of heliocentric distances 4.56 au – 2.23au
detectability of NG effects in the comet's motion comet lost close to perihelion or split comet
type of model of motion GR - gravitational orbit
data weighting NO
number of residuals 131
RMS [arcseconds] 0.51
orbit quality class 1b
orbital elements (barycentric ecliptic J2000)
Epoch 1700 11 05
perihelion date 2001 08 04.74826961 ± 0.00073742
perihelion distance [au] 2.17696802 ± 0.00000527
eccentricity 0.99989815 ± 0.00001263
argument of perihelion [°] 255.937795 ± 0.000280
ascending node [°] 116.910172 ± 0.000033
inclination [°] 152.466335 ± 0.000041
reciprocal semi-major axis [10-6 au-1] 46.78 ± 5.80
file containing 5001 VCs swarm
2000ofa3.bmi
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.
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.