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 75
data interval 2000 07 24 – 2001 08 01
data type observed only before perihelion (PRE)
data arc selection entire data set (STD)
range of heliocentric distances 4.56 au – 2.23au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting NO
number of residuals 140
RMS [arcseconds] 0.52
orbit quality class 2a
orbital elements (barycentric ecliptic J2000)
Epoch 2280 12 14
perihelion date 2001 08 07.10365108 ± 0.01230523
perihelion distance [au] 2.15550895 ± 0.00017258
eccentricity 1.00448927 ± 0.00051495
argument of perihelion [°] 256.083532 ± 0.002772
ascending node [°] 117.296557 ± 0.002438
inclination [°] 152.003898 ± 0.001864
reciprocal semi-major axis [10-6 au-1] -2,082.70 ± 238.73
file containing 5001 VCs swarm
2000ofn2.bpl
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 future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.