C/1992 J1 Spacewatch
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Comet C/1992 J1 was discovered on 1 May 1992 by by David Rabinowitz of the Spacewatch Project thanks to automated system able to detect moving objects (first such a case). At the moment of discovery, the comet was about 1.3 year before its perihelion passage. This comet was last observed in the second half of March 1993.
Comet had its closest approaches to the Earth on 23 March 1993 (2.662 au, before perihelion passage), and on 10 December 1993 (2.659 au, after perihelion passage).
Solution given here is based on data spanning over 2.79 yr in a range of heliocentric distances: 5.46 au – 3.01 au (perihelion) – 5.61 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to more tight future orbit with a semimajor axis of about 1,800 au.
See also Królikowska 2020.

solution description
number of observations 248
data interval 1992 05 01 – 1995 02 02
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 5.46 au – 3.01 au (perihelion) – 5.61 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 493
RMS [arcseconds] 0.75
orbit quality class 1a+
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] 29.34 ± 0.96
previous perihelion distance [au] 88.6 – 101.137 – 116.524
previous aphelion distance [103 au] 65.3 – 68.1 – 71
time interval to previous perihelion [Myr] 6.196 ± 0.293
percentage of VCs with q > 20100
dynamical status definitely dynamically new (DN+)
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