C/1892 Q1 Brooks
more info
C/1892 Q1 was discovered on 28 August 1892 by William Robert Brooks (Smith Observatory at Hobart College, Geneva, New York, USA), that is about 4 months before its perihelion passage, and it was last seen on 19 July 1893 [Kronk, Cometography: Volume 2].
This comet made its closest approach to the Earth on 12 December 1892 (2.27 au), that is about two weeks before perihelion passage.
Solutions given here are based on data spanning over 0.863 yr in a range of heliocentric distances from 2.11 au through perihelion (0.976 au) to 3.04 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to a escape the comet from the planetary zone on hypebolic orbit (see future barycentric orbits).
See also Królikowska 2020.

solution description
number of observations 187
data interval 1892 09 01 – 1893 07 13
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 2.11 au – 0.98 au (perihelion) – 3.04 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 334
RMS [arcseconds] 2.80
orbit quality class 2a
orbital elements (heliocentric ecliptic J2000)
Epoch 1893 01 17
perihelion date 1892 12 28.58670710 ± 0.00022846
perihelion distance [au] 0.97595829 ± 0.00000584
eccentricity 1.00030422 ± 0.00002555
argument of perihelion [°] 252.651332 ± 0.000427
ascending node [°] 266.034217 ± 0.000181
inclination [°] 24.800982 ± 0.000152
recip semi-major axis [10-6 au-1] -311.72 ± 26.18
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] 2.7787 ± 0.4052
A2 [10-8au\day-2] 0.19945 ± 0.38546
A3 [10-8au\day-2] 0 (assumed)
m -2.15
n 5.093
k -4.6142
r0 [au] 2.808
α 0.1113