C/2009 F4 McNaught
more info
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 | 1213 | |
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 | |
type of model of motion | NC - non-gravitational orbits for symmetric CO-g(r)-like function | |
data weighting | YES | |
number of residuals | 2396 | |
RMS [arcseconds] | 0.48 | |
orbit quality class | 1a+ |
orbital elements (heliocentric ecliptic J2000) | ||
---|---|---|
Epoch | 2011 12 25 | |
perihelion date | 2011 12 31.89322875 | ± 0.00043687 |
perihelion distance [au] | 5.45478858 | ± 0.00000370 |
eccentricity | 1.00152558 | ± 0.00000355 |
argument of perihelion [°] | 260.383612 | ± 0.000048 |
ascending node [°] | 53.584435 | ± 0.000006 |
inclination [°] | 79.347535 | ± 0.000007 |
reciprocal semi-major axis [10-6 au-1] | -279.68 | ± 0.65 |
![](media/img/2009f4/2009f4a6ac_res_weights.png)
Upper panel: 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.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
non-gravitational parameters | ||
---|---|---|
A1 [10-8au/day2] | 2.0971 | ± 0.0979 |
A2 [10-8au/day2] | -0.45676 | ± 0.09448 |
A3 [10-8au/day2] | -0.2141 | ± 0.01324 |
m | -2.00 | |
n | 3.000 | |
k | -2.6000 | |
r0 [au] | 10.000 | |
α | 0.0100 |