C/2008 T2 Cardinal
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Comet C/2008 T2 was discovered on 1 October 2008 by Rob D. Cardinal (University of Calgary, Priddis); that is about 8.5 months before its perihelion passage. The comet was observed until 9 September 2009.
Comet had its closest approach to the Earth on 20 March 2009 (1.727 au), about 3 months before its perihelion passage.
Preferred solution given here is based on entire data set spanning over 0.939 yr in a range of heliocentric distances: 3.60 au – 1.202 au (perihelion) – 1.78 au; however, the radial component of this non-gravitational solution is negative.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; these perturbations lead to more tight future orbit (see future barycentric orbits).
See also Królikowska and Dybczyński 2013 and Królikowska 2020.
Comet had its closest approach to the Earth on 20 March 2009 (1.727 au), about 3 months before its perihelion passage.
Preferred solution given here is based on entire data set spanning over 0.939 yr in a range of heliocentric distances: 3.60 au – 1.202 au (perihelion) – 1.78 au; however, the radial component of this non-gravitational solution is negative.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; these perturbations lead to more tight future orbit (see future barycentric orbits).
See also Królikowska and Dybczyński 2013 and Królikowska 2020.
| solution description | ||
|---|---|---|
| number of observations | 1298 | |
| data interval | 2008 10 01 – 2009 06 03 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 3.6 au – 1.6au | |
| 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 | 2609 | |
| RMS [arcseconds] | 0.38 | |
| orbit quality class | 1b | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1710 10 19 | |
| perihelion date | 2009 06 13.07127463 | ± 0.00004356 |
| perihelion distance [au] | 1.20556996 | ± 0.00000062 |
| eccentricity | 0.99998618 | ± 0.00000131 |
| argument of perihelion [°] | 215.823194 | ± 0.000039 |
| ascending node [°] | 309.716760 | ± 0.000022 |
| inclination [°] | 56.285145 | ± 0.000015 |
| reciprocal semi-major axis [10-6 au-1] | 11.47 | ± 1.08 |
| file containing 5001 VCs swarm |
|---|
| 2008t2pa.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.