C/2013 G3 PANSTARRS
more info
Comet C/2013 G3 was discovered on 10 April 2013 with Pan-STARRS 1 telescope (Haleakala), that is 1.6 yr before its perihelion passage. It was observed during four oppositions until 23 December 2016.

Comet had its closest approach to the Earth on 19 May 2014 (3.448 au), about 6 months before perihelion passage.

Solutions given here are based on data spanning over 3.70 yr in a range of heliocentric distances: 6.20 au – 3.852 au (perihelion) – 7.34 au.

NG orbit using full data-arc is determinable.

This Oort spike comet suffered moderate planetary perturbations during its passage through the planetary system; these perturbations led to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).

See also Królikowska and Dones 2023.
solution description
number of observations 912
data interval 2013 04 10 – 2016 12 23
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 6.2 au – 3.85 au (perihelion) – 7.34 au
type of model of motion NS - non-gravitational orbits for standard g(r)
data weighting YES
number of residuals 1808
RMS [arcseconds] 0.31
orbit quality class 1a+
orbital elements (barycentric ecliptic J2000)
Epoch 1711 06 21
perihelion date 2014 11 15.11307724 ± 0.00027365
perihelion distance [au] 3.84463424 ± 0.00000316
eccentricity 0.99991066 ± 0.00000197
argument of perihelion [°] 76.627695 ± 0.000070
ascending node [°] 208.177599 ± 0.000003
inclination [°] 64.634956 ± 0.000008
reciprocal semi-major axis [10-6 au-1] 23.23 ± 0.51
file containing 5001 VCs swarm
2013g3n5.bmi
Upper panel: 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.
Lower panel (panels): O-C diagram for this(two) solution (solutions) given in this database, where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
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.