C/2021 A6 PanSTARRS
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Comet C/2021 A6 was discovered on 8 January 2021, about 4 months before its perihelion passage; later a series of prediscovery images was found from 22 December 2020 and 26 November 2020. In the moment of orbit determination, this comet was still observed.
Solution given here is based on data span over 2.51 yr in a range of heliocentric distances: 7.99 au – 7.93 au (perihelion) – 9.13 au.Orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that lead to a bit tight future orbit.
Solution given here is based on data span over 2.51 yr in a range of heliocentric distances: 7.99 au – 7.93 au (perihelion) – 9.13 au.Orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that lead to a bit tight future orbit.
| solution description | ||
|---|---|---|
| number of observations | 98 | |
| data interval | 2020 11 26 – 2021 05 12 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 7.99 au – 7.93 au (perihelion) – 7.92 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 | 188 | |
| RMS [arcseconds] | 0.23 | |
| orbit quality class | 1b | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 4997 | * |
| no. of escaping VCs in the swarm | 4 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 23.41 – 28.54 – 33.62 | R |
| previous perihelion distance [au] | 1200 – 1800 – 3100 | R |
| previous aphelion distance [103 au] | 58 – 68 – 82 | R |
| time interval to previous perihelion [Myr] | 4.6 – 6 – 8.1 | R |
| percentage of VCs with qprev > 20 | 100 | |
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 4982 | * |
| no. of escaping VCs in the swarm | 19 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 22.39 – 28.42 – 34.73 | R |
| previous perihelion distance [au] | 32 – 72 – 230 | R |
| previous aphelion distance [103 au] | 58 – 70 – 89 | R |
| time interval to previous perihelion [Myr] | 4.8 – 6.4 – 8.9 | R |
| percentage of VCs with 10 < qprev < 20 | 1 | |
| percentage of VCs with qprev > 20 | 99 | |