C/1983 O1 Cernis
more info
Comet C/1983 O1 was discovered by Kazimeras Černis (Vilnius Observatory) on 19 July 1983 (IAUC 3840), two days before its perihelion passage. The comet was last seen on 14 May 1991.
This comet made its closest approach to the Earth on 29 September 1983 (2.445 au), that was about two months after its perihelion passage.
Solutions given here are based on data spanning over 7.81 yr in a range of heliocentric distances from 3.32 au to 19.38 au.
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system that lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 232
data interval 1983 07 21 – 1991 05 14
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 3.32 au – 3.32 au (perihelion) – 19.4 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 461
RMS [arcseconds] 1.11
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 1983 07 05
perihelion date 1983 07 21.24795400 ± 0.01264500
perihelion distance [au] 3.31791426 ± 0.00001672
eccentricity 1.00190643 ± 0.00006801
argument of perihelion [°] 186.220505 ± 0.002908
ascending node [°] 209.578776 ± 0.000048
inclination [°] 134.698671 ± 0.000037
recip semi-major axis [10-6 au-1] -574.59 ± 20.49
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\day-2] 2683 ± 942
A2 [10-8au\day-2] 158.1 ± 677
A3 [10-8au\day-2] 0 (assumed)
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113