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 | 2114 | |
| data interval | 2020 06 18 – 2023 06 03 | |
| data arc selection | data generally limited to post-perihelion (POS) | |
| range of heliocentric distances | 4.48 au – 9.2au | |
| type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| data weighting | YES | |
| number of residuals | 4156 | |
| RMS [arcseconds] | 0.40 | |
| orbit quality class | 1a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2017 09 04 | |
| perihelion date | 2020 06 16.74678107 | ± 0.00182270 |
| perihelion distance [au] | 4.47695111 | ± 0.00000884 |
| eccentricity | 1.00132971 | ± 0.00000780 |
| argument of perihelion [°] | 27.238149 | ± 0.000340 |
| ascending node [°] | 307.892679 | ± 0.000005 |
| inclination [°] | 103.506582 | ± 0.000053 |
| reciprocal semi-major axis [10-6 au-1] | -297.01 | ± 1.74 |
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | 1.3411 | ± 0.1313 |
| A2 [10-8au/day2] | 1.1243 | ± 0.0954 |
| A3 [10-8au/day2] | 0.10302 | ± 0.03692 |
| m | -2.00 | |
| n | 3.000 | |
| k | -2.6000 | |
| r0 [au] | 10.000 | |
| α | 0.0100 | |