C/2020 R7 ATLAS
more info
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 | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 19.87 – 20.74 – 21.61 | |
| previous perihelion distance [au] | 754 – 836 – 903 | |
| previous aphelion distance [103 au] | 91.6 – 95.6 – 99.9 | |
| time interval to previous perihelion [Myr] | 9.83 – 10.5 – 11.2 | |
| percentage of VCs with qprev > 20 | 100 | |
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 19.62 – 20.56 – 21.51 | |
| previous perihelion distance [au] | 20 – 30 – 45 | |
| previous aphelion distance [103 au] | 93 – 97.2 – 102 | |
| time interval to previous perihelion [Myr] | 10.2 – 10.9 – 11.7 | |
| percentage of VCs with 10 < qprev < 20 | 11 | |
| percentage of VCs with qprev > 20 | 89 | |