C/2014 W3 PANSTARRS
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Comet C/2014 W3 was discovered on 18 November 2014 with Pan-STARRS 1 telescope (Haleakala), that is about 9 months after its perihelion passage. This comet was rarely observed until 3 February 2016.
Comet had its closest approach to the Earth on 10 January 2014 (5.204 au), about 1.5 month before its perihelion passage. At the moment of discovery C/2014 W3 was 1.5 month before the next approach to the Earth (5.466 au).
Solution given here is based on data spanning over 1.21 yr in a range of heliocentric distances: 6.34 au – 6.064 au (perihelion) – 7.76 au.
This Oort spike comet suffers 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).

solution description
number of observations 47
data interval 2014 11 18 – 2016 02 03
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 6.34 au – 7.76au
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 93
RMS [arcseconds] 0.46
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 2014 03 04
perihelion date 2014 02 25.26002750 ± 0.01026876
perihelion distance [au] 6.06369638 ± 0.00006707
eccentricity 1.00495264 ± 0.00006500
argument of perihelion [°] 158.730573 ± 0.001217
ascending node [°] 286.367197 ± 0.000057
inclination [°] 90.183345 ± 0.000138
recip semi-major axis [10-6 au-1] -816.77 ± 10.71
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