C/2018 U1 Lemmon
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Comet C/2018 U1 was discovered on 27 October 2019, almost four years before its perihelion passage and is still observed (September 2023, 6.64 au from the Sun).
Currently, the solutions (GR and NG) given here are based on pre-perihelion data and span over 3.94 yr in a range of heliocentric distances: 9.33 au – 5.00 au (perihelion).
Currently, the solutions (GR and NG) given here are based on pre-perihelion data and span over 3.94 yr in a range of heliocentric distances: 9.33 au – 5.00 au (perihelion).
solution description | ||
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number of observations | 2289 | |
data interval | 2019 02 08 – 2021 06 18 | |
data arc selection | data generally limited to pre-perihelion (PRE) | |
range of heliocentric distances | 9.33 au – 5au | |
detectability of NG effects in the comet's motion | comet with determinable NG~orbit | |
type of model of motion | GR - gravitational orbit | |
data weighting | YES | |
number of residuals | 4524 | |
RMS [arcseconds] | 0.36 | |
orbit quality class | 1a+ |
previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
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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] | 65.69 – 66.08 – 66.48 | |
previous perihelion distance [au] | 4.717 – 4.722 – 4.728 | |
previous aphelion distance [103 au] | 30.08 – 30.26 – 30.44 | |
time interval to previous perihelion [Myr] | 1.844 – 1.861 – 1.878 | |
percentage of VCs with qprev < 10 | 100 |
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] | 65.70 – 66.09 – 66.49 | |
previous perihelion distance [au] | 4.9002 – 4.9012 – 4.9021 | |
previous aphelion distance [103 au] | 30.07 – 30.26 – 30.44 | |
time interval to previous perihelion [Myr] | 1.844 – 1.861 – 1.877 | |
percentage of VCs with qprev < 10 | 100 |