C/1952 W1 Mrkos
more info
Comet C/1952 W1 was discovered on 28 November 1952 by Antonin Mrkos (Skalnaté Pleso Observatory, Slovakia), that is almost 2 months before its perihelion passage. It was observed until 5 September 1953 [Kronk, Cometography: Volume 4].
Comet had its closest approach to the Earth on 10 January 1953 (0.922 au), two weeks before its perihelion passage.
Original value of 1/a is negative; however, within its uncertainty of 1 sigma this comet could come from the Oort Cloud.
This comet suffers small planetary perturbations during its passage through the planetary system; these perturbations can lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
See also 2011 and Królikowska 2014.

solution description
number of observations 31
data interval 1952 12 10 – 1953 07 18
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 1.16 au – 0.78 au (perihelion) – 2.86 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting NO
number of residuals 58
RMS [arcseconds] 0.87
orbit quality class 2a
orbital elements (heliocentric ecliptic J2000)
Epoch 1953 01 23
perihelion date 1953 01 24.86051805 ± 0.00058923
perihelion distance [au] 0.77771563 ± 0.00000825
eccentricity 1.00012257 ± 0.00011890
argument of perihelion [°] 253.821595 ± 0.000372
ascending node [°] 343.580131 ± 0.000724
inclination [°] 97.185386 ± 0.000687
recip semi-major axis [10-6 au-1] -157.60 ± 152.88
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] 2.7639 ± 1.5567
A2 [10-8au\day-2] -0.54986 ± 0.14998
A3 [10-8au\day-2] 0 (assumed)
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113