C/2020 W5 Lemmon
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Comet C/2020 W5 was discovered on 20 November 2020, about 10 days before its perihelion passage and was observed to 8 January 2021.
Solution given here is based on data span over 0.134 yr in a very narrow range of heliocentric distances: 3.37 au – 3.36 au (perihelion) – 3.38 au. Due to short data arc uncertainties of orbital elements are relatively large (orbit of 2b quality class).
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to escape the comet from the solar system on hyperbolic barycentric orbit
Solution given here is based on data span over 0.134 yr in a very narrow range of heliocentric distances: 3.37 au – 3.36 au (perihelion) – 3.38 au. Due to short data arc uncertainties of orbital elements are relatively large (orbit of 2b quality class).
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to escape the comet from the solar system on hyperbolic barycentric orbit
| solution description | ||
|---|---|---|
| number of observations | 55 | |
| data interval | 2020 11 20 – 2021 01 08 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 3.37 au – 3.36 au (perihelion) – 3.38 au | |
| detectability of NG effects in the comet's motion | NG effects not determinable | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | YES | |
| number of residuals | 106 | |
| RMS [arcseconds] | 0.39 | |
| orbit quality class | 2b | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 2099 | |
| no. of escaping VCs in the swarm | 2902 | * |
| no. of hyperbolas among escaping VCs in the swarm | 2543 | |
| previous reciprocal semi-major axis [10-6 au-1] | -118.48 – -1.66 – 113.80 | |
| previous perihelion distance [au] | 3.38 – 3.51 – 1910 | R |
| previous aphelion distance [103 au] | 13 – 32 – 180 | |
| time interval to previous perihelion [Myr] | 0.5 – 1.6 – 7.3 | R |
| percentage of VCs with qprev < 10 | 65 | |
| percentage of VCs with qprev > 20 | 35 | |
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 2109 | |
| no. of escaping VCs in the swarm | 2892 | * |
| no. of hyperbolas among escaping VCs in the swarm | 2543 | |
| previous reciprocal semi-major axis [10-6 au-1] | -118.45 – -1.64 – 113.80 | |
| previous perihelion distance [au] | 3.38 – 3.57 – 16 | R |
| previous aphelion distance [103 au] | 13 – 32 – 180 | |
| time interval to previous perihelion [Myr] | 0.5 – 1.6 – 7.4 | R |
| percentage of VCs with qprev < 10 | 87 | |
| percentage of VCs with 10 < qprev < 20 | 5 | |
| percentage of VCs with qprev > 20 | 8 | |