C/2009 F4 McNaught
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Comet C/2009 F4 was discovered on 19 March 2009, that is 2.8 yr before perihelion passage, and next was observed 6.4 yr during seven oppositions in a range of heliocentric distances: 8.96 au – 5.455 au (perihelion) – 10.5 au.
Comet had its closest approach to the Earth on 3 June 2011 (5.179 au, almost seven months before perihelion).
NG orbits using full data-arc as well as using pre-perihelion data arc are determinable.
This Oort spike comet suffers a tiny planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska and Dones 2023 and Królikowska and Dybczyński 2017.
Comet had its closest approach to the Earth on 3 June 2011 (5.179 au, almost seven months before perihelion).
NG orbits using full data-arc as well as using pre-perihelion data arc are determinable.
This Oort spike comet suffers a tiny planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska and Dones 2023 and Królikowska and Dybczyński 2017.
| solution description | ||
|---|---|---|
| number of observations | 1204 | |
| data interval | 2009 03 19 – 2015 08 20 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 8.96 au – 5.46 au (perihelion) – 10.5 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 | 2383 | |
| RMS [arcseconds] | 0.51 | |
| orbit quality class | 1a+ | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1705 07 22 | |
| perihelion date | 2011 12 31.91976934 | ± 0.00020677 |
| perihelion distance [au] | 5.45170706 | ± 0.00000065 |
| eccentricity | 0.99977426 | ± 0.00000140 |
| argument of perihelion [°] | 260.451489 | ± 0.000015 |
| ascending node [°] | 53.538709 | ± 0.000004 |
| inclination [°] | 79.343265 | ± 0.000007 |
| reciprocal semi-major axis [10-6 au-1] | 41.41 | ± 0.26 |
| file containing 5001 VCs swarm |
|---|
| 2009f4a5.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.