C/2015 R3 PANSTARRS
more info
Comet C/2015 R3 was discovered on 12 September 2015 with Pan-STARRS 1 telescope (Haleakala), that is about 1.6 yr after its perihelion passage. This comet was rarely observed until 28 September 2016.
Comet had its closest approach to the Earth on 13 October 2014 (4.794 au), 8 months after its perihelion passage.
Solution given here is based on data spanning over 1.05 yr in a range of heliocentric distances from 6.56 au to 8.54 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit with a semimajor axis of about 4,000 au (see future barycentric orbits).

solution description
number of observations 36
data interval 2015 09 12 – 2016 09 28
data type observed only after perihelion (POST)
data arc selection entire data set (STD)
range of heliocentric distances 6.56 au – 8.54au
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 65
RMS [arcseconds] 0.46
orbit quality class 1b
orbital elements (heliocentric ecliptic J2000)
Epoch 2014 02 12
perihelion date 2014 02 11.76181393 ± 0.01324740
perihelion distance [au] 4.90324280 ± 0.00009957
eccentricity 0.99841764 ± 0.00005607
argument of perihelion [°] 272.008279 ± 0.001127
ascending node [°] 36.429668 ± 0.000117
inclination [°] 83.599006 ± 0.000275
recip semi-major axis [10-6 au-1] 322.72 ± 11.43
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