C/2019 Q1 Lemmon
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Comet C/2019 Q1 was discovered on 28 August 2019, almost one year before its perihelion passage. Later two series of pre-discovery observations were found from 2 January 2019 and 10 November 2018.
Solutions (GR and NG) given here are based on data span over 2.56 yr in a range of heliocentric distances: 6.80 au – 5.00 au (perihelion) – 5.56 au. Orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; however, they lead to escape this comet from the solar system on hyperbolic orbit (see future barycentric orbits).
Solutions (GR and NG) given here are based on data span over 2.56 yr in a range of heliocentric distances: 6.80 au – 5.00 au (perihelion) – 5.56 au. Orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; however, they lead to escape this comet from the solar system on hyperbolic orbit (see future barycentric orbits).
| solution description | ||
|---|---|---|
| number of observations | 160 | |
| data interval | 2018 11 10 – 2020 07 16 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 6.8 au – 5au | |
| type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| data weighting | YES | |
| number of residuals | 314 | |
| RMS [arcseconds] | 0.34 | |
| orbit quality class | 1b | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 4358 | * |
| no. of escaping VCs in the swarm | 643 | |
| no. of hyperbolas among escaping VCs in the swarm | 6 | |
| previous reciprocal semi-major axis [10-6 au-1] | 18.63 – 27.21 – 38.83 | R |
| previous perihelion distance [au] | 340 – 770 – 880 | R |
| previous aphelion distance [103 au] | 51 – 73 – 110 | R |
| time interval to previous perihelion [Myr] | 4.2 – 6.9 – 11 | 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 | 4580 | * |
| no. of escaping VCs in the swarm | 421 | |
| no. of hyperbolas among escaping VCs in the swarm | 2 | |
| previous reciprocal semi-major axis [10-6 au-1] | 19.56 – 28.14 – 38.47 | R |
| previous perihelion distance [au] | 4 – 22 – 280 | R |
| previous aphelion distance [103 au] | 52 – 71 – 100 | R |
| time interval to previous perihelion [Myr] | 4.1 – 6.5 – 11 | R |
| percentage of VCs with qprev < 10 | 33 | |
| percentage of VCs with 10 < qprev < 20 | 15 | |
| percentage of VCs with qprev > 20 | 52 | |