C/1922 U1 Baade
more info
Comet C/1922 U1 was discovered on 19 October 1922 by Walter H.W. Baade (Hamburg Observatory, Bergerdorf, Germany), that is seven days before its perihelion passage, and the comet was last seen on 28 January 1924 [Kronk, Cometography: Volume 3].
This comet made its closest approach to the Earth on 5 October 1922 (1.88 au), that is two weeks before its discovery.
Solution given here is based on data spanning over 1.28 yr in a range of heliocentric distances from 2.260 au through perihelion (2.259 au) to 5.223 au.
This Oort spike comet suffers a 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).
This comet was in the original sample of 19 comets used by Oort for his hypothesis on LPCs, and according to presented here statistics for previous perihelion passage this comet most probably is dynamically new.
More details in Królikowska et al. 2014.

solution description
number of observations 482
data interval 1922 10 22 – 1924 01 28
data type significantly more measurements after perihelion (POST+)
data arc selection entire data set (STD)
range of heliocentric distances 2.26 au – 2.26 au (perihelion) – 5.22 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 826
RMS [arcseconds] 1.82
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 1922 11 02
perihelion date 1922 10 26.53214192 ± 0.00133329
perihelion distance [au] 2.25878685 ± 0.00000759
eccentricity 1.00079818 ± 0.00001927
argument of perihelion [°] 118.298884 ± 0.000483
ascending node [°] 221.578280 ± 0.000054
inclination [°] 51.456548 ± 0.000036
recip semi-major axis [10-6 au-1] -353.37 ± 8.53
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