C/2000 OF8 Spacewatch
more info
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 (heliocentric ecliptic J2000)
Epoch 2001 07 30
perihelion date 2001 08 04.79565919 ± 0.01529465
perihelion distance [au] 2.17306410 ± 0.00004992
eccentricity 1.00135776 ± 0.00022580
argument of perihelion [°] 256.075429 ± 0.005507
ascending node [°] 117.093505 ± 0.000851
inclination [°] 152.436963 ± 0.000187
recip semi-major axis [10-6 au-1] -624.81 ± 103.89
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
non-gravitational parameters
A1 [10-8au/day2] 2.0043 ± 6.4084
A2 [10-8au/day2] -39.662 ± 20.804
A3 [10-8au/day2] -4.4248 ± 2.555
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113