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.

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
next orbit elements (barycentric ecliptic J2000)
no. of returning VCs in the swarm 0
no. of escaping VCs in the swarm 5001
no. of hyperbolas among escaping VCs in the swarm 5001 *
next recip semi-major axis [10-6 au-1] -1,027.85 ± 2.42
next perihelion distance [au] 5.401 ± 0.011
synchronous stop epoch [Myr] 0.572 S
percentage of VCs with q < 10100
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.