C/1978 H1 Meier
more info
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
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 565
RMS [arcseconds] 1.00
orbit quality class 1b
previous orbit elements (barycentric ecliptic J2000)
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 recip semi-major axis [10-6 au-1] 80.54 ± 10.63
previous perihelion distance [au] 0.441 – 0.815 – 1.458
previous aphelion distance [103 au] 21.2 – 24.9 – 29.8
time interval to previous perihelion [Myr] 1.089 – 1.383 – 1.822
percentage of VCs with q < 10100
dynamical status definitely dynamically old (DO+)
Tu absolutnie dowolny tekst
On stellar perturbations
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.