C/1980 E1 Bowell
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Comet C/1980 E1 was discovered on 13 March 1980, two years before its perihelion passage, and was last seen on 30 December 1986 [Kronk and Meyer, Cometography: Volume 5]; later few prediscovery measurements going one month back to 11 February 1979 were found.
The comet made its closest approach to the Earth on 14 June 1982 (2.48 au), that was three months after its perihelion passage.
Solutions given here is based on data span over 6.88 yr in the range of heliocentric distances from: 7.47 au – 3.17 au (perihelion) – 13.91 au.
NG orbit using full data-arc is determinable.
Comet suffered strong planetary perturbations during its passage through the planetary system – the strongest ever noticed in the motion of actual near-parabolic comets. These perturbations lead to escape of the comet from the solar system on hiperbolic orbit with remarkable eccentricity of 1.054 (see future orbit).
See also Królikowska and Dones 2023, Królikowska and Dybczyński 2017,and Królikowska 2014.
The comet made its closest approach to the Earth on 14 June 1982 (2.48 au), that was three months after its perihelion passage.
Solutions given here is based on data span over 6.88 yr in the range of heliocentric distances from: 7.47 au – 3.17 au (perihelion) – 13.91 au.
NG orbit using full data-arc is determinable.
Comet suffered strong planetary perturbations during its passage through the planetary system – the strongest ever noticed in the motion of actual near-parabolic comets. These perturbations lead to escape of the comet from the solar system on hiperbolic orbit with remarkable eccentricity of 1.054 (see future orbit).
See also Królikowska and Dones 2023, Królikowska and Dybczyński 2017,and Królikowska 2014.
| solution description | ||
|---|---|---|
| number of observations | 203 | |
| data interval | 1980 02 11 – 1986 12 30 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 7.47 au – 3.36 au (perihelion) – 13.91 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 | 384 | |
| RMS [arcseconds] | 1.11 | |
| orbit quality class | 1a+ | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 27.04 – 28.35 – 29.66 | |
| previous perihelion distance [au] | 1250 – 1330 – 1410 | |
| previous aphelion distance [103 au] | 66.2 – 69.2 – 72.5 | |
| time interval to previous perihelion [Myr] | 5.91 – 6.34 – 6.81 | |
| percentage of VCs with qprev > 20 | 100 | |
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).
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 26.83 – 28.32 – 29.80 | |
| previous perihelion distance [au] | 2.1 – 3.7 – 6.7 | |
| previous aphelion distance [103 au] | 67.1 – 70.6 – 74.5 | |
| time interval to previous perihelion [Myr] | 6.17 – 6.67 – 7.24 | |
| percentage of VCs with qprev < 10 | 98 | |
| percentage of VCs with 10 < qprev < 20 | 2 | |