C/1993 Q1 Mueller
more info
Comet C/1993 Q1 was discovered on 16 August 1993 by Jean Mueller (Palomar Sky Survey II). Later, a prediscovery image of this comet taken on 28 September 1992 (Palomar Mountain-DSS) was found. At the moment of discovery, this comet was about 7.5 months before its perihelion passage and it was last observed in the mid-April 1994.
Comet had its closest approach to the Earth on 7 May 1994 (0.899 au), 1.5 month after its perihelion passage.
Preferred solution given here is based on data spanning over 1.55 yr in a range of heliocentric distances: 6.51 au – 0.967 au (perihelion) – 1.04 au.
Sekanina (2019) speculates that this comet may not have survived the perihelion passage.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; if C/1993 Q1 survived the perihelion passage these perturbations lead to escape the comet on hyperbolic orbit from the planetary zone.
See also Królikowska 2020. .

solution description
number of observations 536
data interval 1992 09 28 – 1994 04 17
data type almost all measurements before perihelion (PRE++)
data arc selection entire data set (STD)
range of heliocentric distances 6.51 au – 0.97 au (perihelion) – 1.04 au
detectability of NG effects in the comet's motion comet with determinable NG~orbit
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 1066
RMS [arcseconds] 1.00
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 1994 03 29
perihelion date 1994 03 26.27979063 ± 0.00007708
perihelion distance [au] 0.96727581 ± 0.00000225
eccentricity 1.00027545 ± 0.00000200
argument of perihelion [°] 261.033064 ± 0.000154
ascending node [°] 193.788882 ± 0.000027
inclination [°] 105.026187 ± 0.000051
reciprocal semi-major axis [10-6 au-1] -284.77 ± 2.06
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.