C/1885 X1 Fabry
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C/1885 X1 was discovered on 1 December 1885 by Louis Fabry (Paris, France), about 5 months before its perihelion passage, and the comet was last seen on 30 July 1886 [Kronk, Cometography: Volume 2].
This comet made its closest approach to the Earth on 1 May 1886 (0.198 au), that is less than two weeks before perihelion passage.
Solutions given here are based on data spanning over 0.630 yr in a range of heliocentric distances from 2.29 au through perihelion (0.642 au) to 2.00 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
C/1885 X1 was in the original sample of 19 comets used by Oort for his hypothesis on LPCs; however, according to presented here statistics for previous perihelion passage this comet most probably is dynamically old.
See also Królikowska 2020.
This comet made its closest approach to the Earth on 1 May 1886 (0.198 au), that is less than two weeks before perihelion passage.
Solutions given here are based on data spanning over 0.630 yr in a range of heliocentric distances from 2.29 au through perihelion (0.642 au) to 2.00 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system; these perturbations lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).
C/1885 X1 was in the original sample of 19 comets used by Oort for his hypothesis on LPCs; however, according to presented here statistics for previous perihelion passage this comet most probably is dynamically old.
See also Królikowska 2020.
| solution description | ||
|---|---|---|
| number of observations | 217 | |
| data interval | 1885 12 01 – 1886 07 19 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 2.29 au – 0.64 au (perihelion) – 2 au | |
| type of model of motion | NS - non-gravitational orbits for standard g(r) | |
| data weighting | YES | |
| number of residuals | 390 | |
| RMS [arcseconds] | 3.58 | |
| orbit quality class | 2a | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1588 01 17 | |
| perihelion date | 1886 04 05.84692244 | ± 0.00059477 |
| perihelion distance [au] | 0.63999379 | ± 0.00000574 |
| eccentricity | 0.99996093 | ± 0.00001099 |
| argument of perihelion [°] | 126.676913 | ± 0.000644 |
| ascending node [°] | 37.853210 | ± 0.000093 |
| inclination [°] | 82.756505 | ± 0.000459 |
| reciprocal semi-major axis [10-6 au-1] | 61.04 | ± 17.17 |
| file containing 5001 VCs swarm |
|---|
| 1885x1n1.bmi |
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.
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.