C/1983 O1 Cernis

Solar System
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Planetology
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C/1983 O1 Černis

General description

Comet C/1983 O1 was discovered by Kazimeras Cernis (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.

Solution given below is based on data span over 7.81 yr in the range of heliocentric distances from 3.32 au to 19.38 au.

Figure caption: 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.

SSDP Cometary Note C1983O1N3-001

Comet C/1983 O1 Černis

number of observations	232
number of residuals	461
data interval	1983 July 21 — 1991 May 14
rms [arcsec]	1.11
orbit quality class	1a

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT)	19830705.0	= JD 2445520.5
time of perihelion passage (TT)	19830721.247954	± 0.012645
perihelion distance	3.31791426	± 0.00001672
eccentricity	1.00190643	± 0.00006801
argument of perihelion [deg]	186.220505	± 0.002908
longitude of the ascending node [deg]	209.578776	± 0.000048
inclination [deg]	134.698671	± 0.000037
inverse semimajor axis [10^-6 au^-1]	-574.59	± 20.49

Nongravitational parameters [10^-8 au/day²]

A₁ = 2683. ± 942.

A₂ = 158. ± 677.

A₃ = 0.0 (assumed)

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.

Figure caption: Six 2D-projections of the 6D space of original swarm (5001 VCs) of C/1983 O1. Each density map is given in logarithmic scale presented on the right in the individual panel.
The same figure in the new window

Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	16800801
time of perihelion passage (TT)	19830721.857189	± 0.018492
perihelion distance	3.32563612	± 0.00001829
eccentricity	0.99979769	± 0.00012012
argument of perihelion [deg]	186.280264	± 0.004512
longitude of the ascending node [deg]	209.611749	± 0.000056
inclination [deg]	134.684921	± 0.000037
inverse semimajor axis [10^-6 au^-1]	60.83	± 36.12

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here (data format), i.e. before entering the planetary zone.

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	22830910
time of perihelion passage (TT)	19830722.539563	± 0.001245
perihelion distance	3.32055481	± 0.00001296
eccentricity	1.00062077	± 0.00000692
argument of perihelion [deg]	186.331396	± 0.000353
longitude of the ascending node [deg]	209.664462	± 0.000047
inclination [deg]	134.633032	± 0.000037
inverse semimajor axis [10^-6 au^-1]	-186.95	± 2.08