C/2020 R7 ATLAS
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Comet C/2020 R7 was discovered on 15 September 2020, two years before its perihelion passage. Later a series of observations were found from 3 December 2019. In the moment of orbit determination, this comet was still observed.
Currently, solutions (GR and NG) based on pre-perihelion data are given. Therefore, the data arc span over 2.78 yr in a range of heliocentric distances from 9.08 au to 2.96 au.
This is Oort spike comet. According to orbits obtained using pre-perihelion data this comet suffers moderate planetary perturbations that lead to a significantly more tight future orbit (semimajor axis of about 2,000 au).
Currently, solutions (GR and NG) based on pre-perihelion data are given. Therefore, the data arc span over 2.78 yr in a range of heliocentric distances from 9.08 au to 2.96 au.
This is Oort spike comet. According to orbits obtained using pre-perihelion data this comet suffers moderate planetary perturbations that lead to a significantly more tight future orbit (semimajor axis of about 2,000 au).
| solution description | ||
|---|---|---|
| number of observations | 403 | |
| data interval | 2019 12 03 – 2022 09 15 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 9.08 au – 2.96au | |
| 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 | 802 | |
| RMS [arcseconds] | 0.40 | |
| orbit quality class | 1a+ | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1720 12 30 | |
| perihelion date | 2022 09 15.74723565 | ± 0.00020129 |
| perihelion distance [au] | 2.95316018 | ± 0.00000123 |
| eccentricity | 0.99997114 | ± 0.00000213 |
| argument of perihelion [°] | 347.784038 | ± 0.000052 |
| ascending node [°] | 268.199140 | ± 0.000007 |
| inclination [°] | 114.8155 | ± 0.000007 |
| reciprocal semi-major axis [10-6 au-1] | 9.77 | ± 0.72 |
| file containing 5001 VCs swarm |
|---|
| 2020r7pa.bmi |
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.