C/1978 H1 Meier
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Comet C/1978 H1 was discovered on 26 April 1978 by Rolf G.W. Meier (Ottawa, Canada), that is about 6.5 months before its perihelion passage.This comet was last observed in December 1979.
Comet had its closest approach to the Earth on 21 November 1978 (2.005 au), 10 days after its perihelion passage.
Solutions given here are based on data spanning over 1.62 yr in a range of heliocentric distances: 3.00 au – 1.137 au (perihelion) – 5.02 au.
This Oort spike comet suffers large planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the solar system on hyperbolic orbit.
See also Królikowska 2014 and Królikowska 2020.
Comet had its closest approach to the Earth on 21 November 1978 (2.005 au), 10 days after its perihelion passage.
Solutions given here are based on data spanning over 1.62 yr in a range of heliocentric distances: 3.00 au – 1.137 au (perihelion) – 5.02 au.
This Oort spike comet suffers large planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the solar system on hyperbolic orbit.
See also Królikowska 2014 and Królikowska 2020.
| solution description | ||
|---|---|---|
| number of observations | 286 | |
| data interval | 1978 04 28 – 1979 12 09 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 3 au – 1.14 au (perihelion) – 5.02 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 | 565 | |
| RMS [arcseconds] | 1.04 | |
| 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] | 21.12 – 23.88 – 26.69 | |
| previous perihelion distance [au] | 2110 – 2320 – 2590 | |
| previous aphelion distance [103 au] | 73 – 81 – 92 | |
| time interval to previous perihelion [Myr] | 6.9 – 8.1 – 9.8 | |
| percentage of VCs with qprev > 20 | 100 | |
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.
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 4996 | * |
| no. of escaping VCs in the swarm | 5 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 20.61 – 23.76 – 26.86 | R |
| previous perihelion distance [au] | 16 – 42 – 110 | R |
| previous aphelion distance [103 au] | 74 – 84 – 97 | R |
| time interval to previous perihelion [Myr] | 7.1 – 8.5 – 10 | R |
| percentage of VCs with qprev < 10 | 3 | |
| percentage of VCs with 10 < qprev < 20 | 14 | |
| percentage of VCs with qprev > 20 | 83 | |