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. This comet was observed until 4 April 2024 (as in February 2025).
Comet had its closest approach to the Earth on 16 July 2020 (3.65 au), a month after its perihelion passage.
The preferred NG solution given here span over 6.49 yr in a range of heliocentric distances: 8.64 au – 4.48 au (perihelion) – 10.95 au; orbits based on pre-perihelion and post-perihelion data independently are also presented.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to a more tight future orbit with semimajor axis of about 2,500 au (see future barycentric orbit).
Comet had its closest approach to the Earth on 16 July 2020 (3.65 au), a month after its perihelion passage.
The preferred NG solution given here span over 6.49 yr in a range of heliocentric distances: 8.64 au – 4.48 au (perihelion) – 10.95 au; orbits based on pre-perihelion and post-perihelion data independently are also presented.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to a more tight future orbit with semimajor axis of about 2,500 au (see future barycentric orbit).
| solution description | ||
|---|---|---|
| number of observations | 2123 | |
| data interval | 2020 06 18 – 2024 04 04 | |
| data arc selection | data generally limited to post-perihelion (POS) | |
| range of heliocentric distances | 4.48 au – 10.95au | |
| type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| data weighting | YES | |
| number of residuals | 4194 | |
| RMS [arcseconds] | 0.40 | |
| orbit quality class | 1a | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2329 04 02 | |
| perihelion date | 2020 06 15.70632005 | ± 0.00106301 |
| perihelion distance [au] | 4.46872083 | ± 0.00000655 |
| eccentricity | 0.99828395 | ± 0.00000399 |
| argument of perihelion [°] | 27.198189 | ± 0.000123 |
| ascending node [°] | 307.986256 | ± 0.000030 |
| inclination [°] | 103.56872 | ± 0.000006 |
| reciprocal semi-major axis [10-6 au-1] | 384.01 | ± 0.89 |
| file containing 5001 VCs swarm |
|---|
| 2019k7rd.bpl |
Upper panel: Time distribution of positional observations with corresponding heliocentric (red curve) and geocentric (green curve) distance at which they were taken. The horizontal dotted line shows the perihelion distance for a given comet whereas vertical dotted line — the moment of perihelion passage.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
Six 2D-projections of the 6D space of future swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.