C/2013 G3 PANSTARRS
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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 62
data interval 2014 11 25 – 2016 12 23
data arc selection data generally limited to post-perihelion (POS)
range of heliocentric distances 3.85 au – 7.34au
detectability of NG effects in the comet's motion comet with NG effects strongly manifested in positional data fitting
type of model of motion GR - gravitational orbit
data weighting YES
number of residuals 119
RMS [arcseconds] 0.43
orbit quality class 1a
orbital elements (heliocentric ecliptic J2000)
Epoch 2014 12 09
perihelion date 2014 11 15.19224712 ± 0.00078546
perihelion distance [au] 3.85218243 ± 0.00000892
eccentricity 1.00052864 ± 0.00000601
argument of perihelion [°] 76.497643 ± 0.000187
ascending node [°] 208.125993 ± 0.000031
inclination [°] 64.669251 ± 0.000019
reciprocal semi-major axis [10-6 au-1] -137.23 ± 1.56
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.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).