C/1974 F1 Lovas
more info
Comet C/1974 F1 was discovered on 22 February 1974 by Miklós Lovas (Budapest Observatory, Hungary), that is 1.5 years before its perihelion passage.
Comet had its closest approach to the Earth on 23 May 1975 (2.470 au), about 3 months before its perihelion passage.
Solutions given here are based on data spanning over 3.48 yr in a range of heliocentric distances: 5.64 au – 3.011 au (perihelion) – 7.26 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to a more tight future orbit with semimajor axis of about 1,900 au.
See also Królikowska 2020.

solution description
number of observations 137
data interval 1974 03 21 – 1977 09 11
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 5.64 au – 3.01 au (perihelion) – 7.26 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 273
RMS [arcseconds] 1.08
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 1975 08 16
perihelion date 1975 08 22.18105870 ± 0.00045462
perihelion distance [au] 3.01143760 ± 0.00001130
eccentricity 0.99958340 ± 0.00001388
argument of perihelion [°] 261.366389 ± 0.000102
ascending node [°] 12.368600 ± 0.000046
inclination [°] 50.648531 ± 0.000058
recip semi-major axis [10-6 au-1] 138.34 ± 4.61
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] 50.921 ± 37.969
A2 [10-8au\day-2] -0.979 ± 30.755
A3 [10-8au\day-2] -14.291 ± 6.735
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113