C/2012 K1 PANSTARRS
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Comet C/2012 K1 was discovered on 19 May 2012 with Pan-STARRS 1 telescope (Haleakala), that is more than 2 years before its perihelion passage. Later a few pre-discovery images were found taken on 14 May ( MASTER-II Observatory, Tunka) and 17 May (Pan-STARRS 1). It was almost systematically observed until 7 August 2016 (see picture).
C/2012 K1 had its closest approach to the Earth on 31 October 2014 (0.953 au), about 2 months after its perihelion passage.
Preferred solution given here is based on data spanning over 4.23 yr in a range of heliocentric distances: 8.83 au – 1.055 au (perihelion) – 7.85 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that cause a bit tighter future orbit (see future barycentric orbits).
See also Królikowska 2020.
C/2012 K1 had its closest approach to the Earth on 31 October 2014 (0.953 au), about 2 months after its perihelion passage.
Preferred solution given here is based on data spanning over 4.23 yr in a range of heliocentric distances: 8.83 au – 1.055 au (perihelion) – 7.85 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that cause a bit tighter future orbit (see future barycentric orbits).
See also Królikowska 2020.
| solution description | ||
|---|---|---|
| number of observations | 7871 | |
| data interval | 2012 05 14 – 2016 08 07 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 8.83 au – 1.05 au (perihelion) – 7.85 au | |
| type of model of motion | NT - non-gravitational orbits for asymmetric, standard g(r) | |
| data weighting | YES | |
| number of residuals | 15569 | |
| RMS [arcseconds] | 0.34 | |
| orbit quality class | 1a+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2014 08 11 | |
| perihelion date | 2014 08 27.65616383 | ± 0.00000837 |
| perihelion distance [au] | 1.05455168 | ± 0.00000013 |
| eccentricity | 1.00013986 | ± 0.00000041 |
| argument of perihelion [°] | 203.105867 | ± 0.000010 |
| ascending node [°] | 317.737772 | ± 0.000006 |
| inclination [°] | 142.428605 | ± 0.000002 |
| reciprocal semi-major axis [10-6 au-1] | -132.62 | ± 0.39 |
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.
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | 2.2829 | ± 0.01 |
| A2 [10-8au/day2] | -0.14098 | ± 0.00834 |
| A3 [10-8au/day2] | -0.27742 | ± 0.00246 |
| m | -2.15 | |
| n | 5.093 | |
| k | -4.6142 | |
| r0 [au] | 2.808 | |
| α | 0.1113 | |
| ΔT [days] | 2.4644 | ± 0.2317 |