C/1973 E1 Kohoutek
more info
Comet C/1973 E1 was discovered on 7 March 1973 by Luboš Kohoutek (Hamburg Observatory, Bergerdorf, Germany), that is 9 months and 3 weeks before its perihelion passage.Later, a prediscovery observation was found taken on 28 January at the same place. This comet was observed until 10 November 1974 [Kronk, Cometography: Volume 5].
Comet had its closest approach to the Earth on 15 January 1974 (0.806 au), 2.5 weeks after its perihelion passage.
Solution given here is based on data spanning over 1.24 yr in a range of heliocentric distances: 5.15 au – 0.142 au (perihelion) – 2.52 au.
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system; these perturbations lead to a more tight future orbit with semimajor axis of about 1,700 au.
See also Królikowska 2020.
Comet had its closest approach to the Earth on 15 January 1974 (0.806 au), 2.5 weeks after its perihelion passage.
Solution given here is based on data spanning over 1.24 yr in a range of heliocentric distances: 5.15 au – 0.142 au (perihelion) – 2.52 au.
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system; these perturbations lead to a more tight future orbit with semimajor axis of about 1,700 au.
See also Królikowska 2020.
| solution description | ||
|---|---|---|
| number of observations | 850 | |
| data interval | 1973 01 28 – 1974 04 26 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 5.15 au – 0.14 au (perihelion) – 2.52 au | |
| type of model of motion | NS - non-gravitational orbits for standard g(r) | |
| data weighting | YES | |
| number of residuals | 1690 | |
| RMS [arcseconds] | 1.36 | |
| orbit quality class | 2a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1973 12 24 | |
| perihelion date | 1973 12 28.43058719 | ± 0.00004303 |
| perihelion distance [au] | 0.14242263 | ± 0.00000378 |
| eccentricity | 0.99999766 | ± 0.00001781 |
| argument of perihelion [°] | 37.792322 | ± 0.001934 |
| ascending node [°] | 258.495486 | ± 0.001500 |
| inclination [°] | 14.303813 | ± 0.000118 |
| reciprocal semi-major axis [10-6 au-1] | 16.46 | ± 125.06 |
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] | 0.23729 | ± 0.39863 |
| A2 [10-8au/day2] | -0.031613 | ± 0.011024 |
| A3 [10-8au/day2] | -0.4033 | ± 0.10609 |
| m | -2.15 | |
| n | 5.093 | |
| k | -4.6142 | |
| r0 [au] | 2.808 | |
| α | 0.1113 | |