C/1993 F1 Mueller
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Comet C/1993 F1 was discovered by Jean Mueller on a 75-min exposure obtained on 19 March 1993 by J. D. Mendenhall and herself (with the 1.2-m Oschin Schmidt telescope in the course of the second Palomar Sky Survey; see IAUC 5723), when the comet was 7.5 months after its perihelion passage. The comet was last seen on 4 July 1995.
The comet made its close approach to the Earth on 8 February 1993 (5.52 au), that was six weeks before its discovery (six months after perihelion). However, slightly deeper close approach to the Earth was in the previous opposition (not observed) when the comet was within 5.28 au from the Earth (10 January 1992, about seven months before perihelion passage).
Solution given here is based on data spanning over 2.27 yr in a range of heliocentric distances from 6.11 au to 9.30 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to escape of the comet from the solar system (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.

solution description
number of observations 111
data interval 1993 03 19 – 1995 07 04
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 6.11 au – 9.3au
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 219
RMS [arcseconds] 1.11
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 1992 08 06
perihelion date 1992 08 04.50276100 ± 0.01058900
perihelion distance [au] 5.90039749 ± 0.00006949
eccentricity 1.00574936 ± 0.00003689
argument of perihelion [°] 61.992684 ± 0.001170
ascending node [°] 77.515654 ± 0.000132
inclination [°] 53.940015 ± 0.000051
reciprocal semi-major axis [10-6 au-1] -974.40 ± 6.22
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.