C/2013 B2 Catalina
more info
Comet C/2013 B2 was discovered on 16 January 2013 during Catalina Sky Survey, that is 5.5 months before perihelion passage, and next observed 1.2 yr in a range of heliocentric distances: 4.01 au – 3.734 au (perihelion) – 4.43 au.
C/2013 B2 had its closest approach to the Earth on 23 January 2013 (3.251 au, one week after discovery, see figure).
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit.
See also Królikowska and Dybczyński 2017.

solution description
number of observations 132
data interval 2013 01 16 – 2014 03 30
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 4.01 au – 3.73 au (perihelion) – 4.43 au
detectability of NG effects in the comet's motion comet with determinable NG~orbit
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 260
RMS [arcseconds] 0.30
orbit quality class 1a
orbital elements (barycentric ecliptic J2000)
Epoch 1709 12 08
perihelion date 2013 07 01.53428897 ± 0.00087960
perihelion distance [au] 3.73286287 ± 0.00000373
eccentricity 0.99978818 ± 0.00000834
argument of perihelion [°] 156.436595 ± 0.000157
ascending node [°] 332.056556 ± 0.000045
inclination [°] 43.476769 ± 0.00003
reciprocal semi-major axis [10-6 au-1] 56.74 ± 2.23
file containing 5001 VCs swarm
2013b2a5.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.