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

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 NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting YES
number of residuals 1808
RMS [arcseconds] 0.31
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2014 12 09
perihelion date 2014 11 15.19294308 ± 0.00036477
perihelion distance [au] 3.85217984 ± 0.00000270
eccentricity 1.00051675 ± 0.00000380
argument of perihelion [°] 76.497972 ± 0.000073
ascending node [°] 208.125620 ± 0.000010
inclination [°] 64.669357 ± 0.000009
recip semi-major axis [10-6 au-1] -134.14 ± 0.98
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
non-gravitational parameters
A1 [10-8au\day-2] 0.4856 ± 0.0753
A2 [10-8au\day-2] 0.23671 ± 0.12319
A3 [10-8au\day-2] 0.35256 ± 0.01333
m -2.00
n 3.000
k -2.6000
r0 [au] 10.000
α 0.0100