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 | 1113 | |
| data interval | 2021 10 22 – 2023 03 19 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 6.09 au – 3.3au | |
| type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
| data weighting | YES | |
| number of residuals | 2188 | |
| RMS [arcseconds] | 0.31 | |
| orbit quality class | 1a | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1717 12 06 | |
| perihelion date | 2023 05 28.86366104 | ± 0.00260490 |
| perihelion distance [au] | 3.22846771 | ± 0.00001846 |
| eccentricity | 0.99904452 | ± 0.00000924 |
| argument of perihelion [°] | 334.723671 | ± 0.000466 |
| ascending node [°] | 10.526026 | ± 0.000024 |
| inclination [°] | 140.134277 | ± 0.000003 |
| reciprocal semi-major axis [10-6 au-1] | 295.95 | ± 2.86 |
| file containing 5001 VCs swarm |
|---|
| 2021x1pc.bmi |
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.
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.