C/2019 K7 Smith
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Comet C/2019 K7 was discovered on 30 May 2019, more than one year before its perihelion passage. Later a few pre-discovery observations were found from 8 and 9 October 2017. In the moment of orbit determination, this comet was still observed.
Solutions (GR and NG) given here span over 5.49 yr in a range of heliocentric distances: 8.64 au – 4.48 au (perihelion) – 9.2 au; orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
Solutions (GR and NG) given here span over 5.49 yr in a range of heliocentric distances: 8.64 au – 4.48 au (perihelion) – 9.2 au; orbits based on pre-perihelion and post-perihelion data independently were also obtained.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
| solution description | ||
|---|---|---|
| number of observations | 631 | |
| data interval | 2017 10 08 – 2020 06 17 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 8.64 au – 4.48 au (perihelion) – 4.48 au | |
| 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 | 1246 | |
| RMS [arcseconds] | 0.29 | |
| orbit quality class | 1a+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2017 09 04 | |
| perihelion date | 2020 06 16.72120767 | ± 0.00067297 |
| perihelion distance [au] | 4.47710757 | ± 0.00000315 |
| eccentricity | 1.00146534 | ± 0.00000275 |
| argument of perihelion [°] | 27.233794 | ± 0.000100 |
| ascending node [°] | 307.892862 | ± 0.000005 |
| inclination [°] | 103.506899 | ± 0.000014 |
| reciprocal semi-major axis [10-6 au-1] | -327.30 | ± 0.61 |