C/2014 N3 NEOWISE
more info
Comet C/2014 N3 was discovered on 4 July 2014 with Near-Earth Object Wide-field Infrared Survey Explorer, that is more than 8 months before its perihelion passage. This comet was observed until 6 January 2017.
Comet had its closest approach to the Earth on 9 October 2014 (3.30 au), five months before perihelion passage.
Solutions given here are based on data spanning over 2.51 yr in a range of heliocentric distances: 4.45 au – 3.882 au (perihelion) – 6.70 au.
This Oort spike comet suffers moderate planetary perturbations during its passage through the planetary system; these perturbations lead to a more tight future orbit (see future barycentric orbits).

solution description
number of observations 1610
data interval 2014 07 04 – 2017 01 06
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 4.45 au – 3.88 au (perihelion) – 6.7 au
type of model of motion NC - non-gravitational orbits for symmetric CO-g(r)-like function
data weighting YES
number of residuals 3164
RMS [arcseconds] 0.38
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2015 02 27
perihelion date 2015 03 13.23557694 ± 0.00047969
perihelion distance [au] 3.88225513 ± 0.00000101
eccentricity 0.99945324 ± 0.00000189
argument of perihelion [°] 353.571626 ± 0.000084
ascending node [°] 19.926831 ± 0.000008
inclination [°] 61.634908 ± 0.000008
recip semi-major axis [10-6 au-1] 140.84 ± 0.49
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] 1.092 ± 0.0741
A2 [10-8au\day-2] 0.22044 ± 0.08212
A3 [10-8au\day-2] -0.1916 ± 0.0456
m -2.00
n 3.000
k -2.6000
r0 [au] 10.000
α 0.0100