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
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 |
| reciprocal 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 | |