C/1895 W1 Perrine
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C/1895 W1 was discovered on 17 November 1895 by Charles Dillon Perrine (Lick Observatory, California, USA), that is about a month before its perihelion passage, and it was last seen on 10 August 1896 [Kronk, Cometography: Volume 2].
This comet made its closest approach to the Earth on 14 December 1895 (0.794 au), that is 4 days before perihelion passage.
Solutions given here are based on data spanning over 0.726 yr in a range of heliocentric distances from 0.92 au through perihelion (0.192 au) to 4.01 au.
This comet suffers small planetary perturbations during its passage through the planetary system; these perturbations lead to a more tight future orbit with a semimajor axis of about 2,300 au (see future barycentric orbits).
See also Królikowska 2020.

solution description
number of observations 103
data interval 1895 11 18 – 1896 08 10
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 0.92 au – 0.19 au (perihelion) – 4.01 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 156
RMS [arcseconds] 2.42
orbit quality class 2a
previous orbit elements (barycentric ecliptic J2000)
no. of returning VCs in the swarm 4341 *
no. of escaping VCs in the swarm 660
no. of hyperbolas among escaping VCs in the swarm 577
previous recip semi-major axis [10-6 au-1] 236.29 ± 199.92
previous perihelion distance [au] 0.19 – 0.192 – 1.597 R
previous aphelion distance [103 au] 4 – 7.5 – 24.4 R
time interval to previous perihelion [Myr] 0.088 – 0.228 – 1.352 R
percentage of VCs with q < 1096
percentage of VCs with 10 < q < 201
percentage of VCs with q > 203
dynamical status uncertain (DU )
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On stellar perturbations
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.