C/1952 W1 Mrkos
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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
previous orbit statistics, both Galactic and stellar perturbations were taken into account
no. of returning VCs in the swarm 975
no. of escaping VCs in the swarm 4026
no. of hyperbolas among escaping VCs in the swarm 3627 *
previous reciprocal semi-major axis [10-6 au-1] -130.06 – -43.07 – 45.53
previous perihelion distance [au] 0.84 – 240 – 940 R
previous aphelion distance [103 au] 23 – 61 – 370
time interval to previous perihelion [Myr] 1.1 – 3.1 – 9.7 R
percentage of VCs with qprev < 1042
percentage of VCs with qprev > 2058
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.
previous orbit statistics, here only the Galactic tide has been included
no. of returning VCs in the swarm 1017
no. of escaping VCs in the swarm 3984
no. of hyperbolas among escaping VCs in the swarm 3627 *
previous reciprocal semi-major axis [10-6 au-1] -130.08 – -43.08 – 45.53
previous perihelion distance [au] 0.86 – 2.2 – 81 R
previous aphelion distance [103 au] 23 – 61 – 370
time interval to previous perihelion [Myr] 1.1 – 3.3 – 10 R
percentage of VCs with qprev < 1072
percentage of VCs with 10 < qprev < 207
percentage of VCs with qprev > 2021