C/1912 R1 Gale
more info
Comet C/1912 R1 was discovered on 9 September 1912 by Walter Frederick Gale (Sydney, New Aouth Wales, Australia), that is about one month before its perihelion passage, and it was last seen on 26 May 1913 [Kronk, Cometography: Volume 3].
This comet made its closest approach to the Earth on 14 September 1907 (0.920 au), that is five days after its discovery.
Solution given here is based on data spanning over 0.704 yr in a range of heliocentric distances from 1.366 au through perihelion (0.716 au) to 1.747 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system that lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbit).
More details in Królikowska et al. 2014.

solution description
number of observations 935
data interval 1912 09 11 – 1913 05 26
data type significantly more measurements after perihelion (POST+)
data arc selection entire data set (STD)
range of heliocentric distances 0.86 au – 0.72 au (perihelion) – 3.59 au
detectability of NG effects in the comet's motion NG effects not determinable
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 1670
RMS [arcseconds] 2.48
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 1912 10 05
perihelion date 1912 10 05.45319206 ± 0.00005296
perihelion distance [au] 0.71607473 ± 0.00000084
eccentricity 1.00045667 ± 0.00000377
argument of perihelion [°] 25.621533 ± 0.000108
ascending node [°] 298.246936 ± 0.000110
inclination [°] 79.809959 ± 0.000085
reciprocal semi-major axis [10-6 au-1] -637.75 ± 5.27
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.