C/2021 X1 Maury-Attard= A/2021 X1
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Comet C/2021 X1 was discovered on 2 December 2021 by Alain Maury and Georges Attard using MAP program (San Pedro de Atacama), that is about a year and half before its perihelion passage.
Comet had its closest approach to the Earth on 25 September 2023 (6.80 au), about four months after its perihelion passage.
The preferred GR solution given here is based on data span over 6.09 yr in a range of heliocentric distances: 6.06 au – 3.23 au (perihelion) – 5.49 au. Some trends in [O-C] diagram are visible for GR orbit; however, NG solution based on the entire data arc results in negative radial NG parameter A1, so this solution is not given here.
This long-period comet (original semimajor axis about 3,500 au) suffers small planetary perturbations during its passage through the planetary system that lead to a more loose future orbit of about 10,000 au.
Comet had its closest approach to the Earth on 25 September 2023 (6.80 au), about four months after its perihelion passage.
The preferred GR solution given here is based on data span over 6.09 yr in a range of heliocentric distances: 6.06 au – 3.23 au (perihelion) – 5.49 au. Some trends in [O-C] diagram are visible for GR orbit; however, NG solution based on the entire data arc results in negative radial NG parameter A1, so this solution is not given here.
This long-period comet (original semimajor axis about 3,500 au) suffers small planetary perturbations during its passage through the planetary system that lead to a more loose future orbit of about 10,000 au.
| solution description | ||
|---|---|---|
| number of observations | 2996 | |
| data interval | 2021 10 22 – 2024 09 30 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 6.09 au – 3.23 au (perihelion) – 5.49 au | |
| 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 | 5864 | |
| RMS [arcseconds] | 0.35 | |
| 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] | 283.34 – 283.52 – 283.70 | |
| previous perihelion distance [au] | 3.23267 – 3.23268 – 3.23269 | |
| previous aphelion distance [103 au] | 7.0465 – 7.0509 – 7.0554 | |
| time interval to previous perihelion [Myr] | 0.20885 – 0.20904 – 0.20924 | |
| percentage of VCs with qprev < 10 | 100 | |
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.
| previous_g 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] | 283.34 – 283.52 – 283.70 | |
| previous perihelion distance [au] | 3.23185 – 3.23186 – 3.23187 | |
| previous aphelion distance [103 au] | 7.0465 – 7.051 – 7.0554 | |
| time interval to previous perihelion [Myr] | 0.20885 – 0.20905 – 0.20925 | |
| percentage of VCs with qprev < 10 | 100 | |