C/1895 W1 Perrine
more info
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
orbital elements (heliocentric ecliptic J2000)
Epoch 1896 01 02
perihelion date 1895 12 18.82948885 ± 0.00039781
perihelion distance [au] 0.19198819 ± 0.00000940
eccentricity 1.00004411 ± 0.00002641
argument of perihelion [°] 272.666036 ± 0.002569
ascending node [°] 321.954075 ± 0.001103
inclination [°] 141.625818 ± 0.000386
recip semi-major axis [10-6 au-1] -229.73 ± 137.56
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/day2] 0.481 ± 1.3842
A2 [10-8au/day2] 0.32188 ± 0.15973
A3 [10-8au/day2] 0 (assumed)
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113