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 | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| 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 16.22097539 | ± 0.00067221 |
| perihelion distance [au] | 2.95600664 | ± 0.00000220 |
| eccentricity | 1.00016483 | ± 0.00000748 |
| argument of perihelion [°] | 347.833003 | ± 0.000190 |
| ascending node [°] | 268.281764 | ± 0.000027 |
| inclination [°] | 114.891121 | ± 0.000039 |
| reciprocal semi-major axis [10-6 au-1] | -55.76 | ± 2.53 |
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | 2.2237 | ± 0.1445 |
| A2 [10-8au/day2] | 1.6224 | ± 0.1074 |
| A3 [10-8au/day2] | -0.099447 | ± 0.037489 |
| m | -2.00 | |
| n | 3.000 | |
| k | -2.6000 | |
| r0 [au] | 10.000 | |
| α | 0.0100 | |