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 | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| 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 reciprocal semi-major axis [10-6 au-1] | 31.38 – 38.85 – 43.56 | |
| previous perihelion distance [au] | 350 – 1000 – 1700 | |
| previous aphelion distance [103 au] | 45.5 – 50.4 – 62 | |
| time interval to previous perihelion [Myr] | 2.8 – 3.7 – 5.2 | |
| percentage of VCs with qprev < 10 | 2 | |
| percentage of VCs with qprev > 20 | 98 | |
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.
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| 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 reciprocal semi-major axis [10-6 au-1] | 32.70 – 41.24 – 50.01 | |
| previous perihelion distance [au] | 4.2 – 6.9 – 17 | |
| previous aphelion distance [103 au] | 40 – 48 – 61 | |
| time interval to previous perihelion [Myr] | 2.8 – 3.8 – 5.3 | |
| percentage of VCs with qprev < 10 | 73 | |
| percentage of VCs with 10 < qprev < 20 | 19 | |
| percentage of VCs with qprev > 20 | 8 | |