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 | |
| type of model of motion | NS - non-gravitational orbits for standard g(r) | |
| data weighting | YES | |
| number of residuals | 802 | |
| RMS [arcseconds] | 0.30 | |
| orbit quality class | 1a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2022 09 18 | |
| perihelion date | 2022 09 16.18167263 | ± 0.00500938 |
| perihelion distance [au] | 2.95605774 | ± 0.00001126 |
| eccentricity | 1.00024652 | ± 0.00003535 |
| argument of perihelion [°] | 347.822057 | ± 0.001410 |
| ascending node [°] | 268.281205 | ± 0.000160 |
| inclination [°] | 114.892173 | ± 0.000296 |
| reciprocal semi-major axis [10-6 au-1] | -83.39 | ± 11.96 |
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | 899.81 | ± 58.01 |
| A2 [10-8au/day2] | 310.51 | ± 69.31 |
| A3 [10-8au/day2] | 132.78 | ± 38.84 |
| m | -2.15 | |
| n | 5.093 | |
| k | -4.6142 | |
| r0 [au] | 2.808 | |
| α | 0.1113 | |