C/2016 E1 PANSTARRS
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Comet C/2016 E1 was discovered on 3 March 2016 with Pan-STARRS 1 telescope (Haleakala), that is about 1.3 yr before its perihelion passage. This comet was observed until 25 April 2019.
Comet had its closest approach to the Earth on 10 April 2017 (7.345 au), almost 2 months before its perihelion passage.
Solution given here is based on data spanning over 3.14 yr in a range of heliocentric distances: 8.62 au – 8.177 au (perihelion) – 9.16 au.
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system; however, these perturbations likely lead to escape the comet from the planetary zone on a hyperbolic orbit (see future barycentric orbits).

solution description
number of observations 164
data interval 2016 03 03 – 2019 04 25
data type perihelion within the observation arc (FULL)
data arc selection entire data set (STD)
range of heliocentric distances 8.62 au – 8.18 au (perihelion) – 9.16 au
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 315
RMS [arcseconds] 0.23
orbit quality class 1a+
orbital elements (heliocentric ecliptic J2000)
Epoch 2017 07 26
perihelion date 2017 06 01.58401649 ± 0.00189947
perihelion distance [au] 8.17678270 ± 0.00001081
eccentricity 1.00309388 ± 0.00000881
argument of perihelion [°] 47.319350 ± 0.000111
ascending node [°] 233.036690 ± 0.000013
inclination [°] 131.892092 ± 0.000014
recip semi-major axis [10-6 au-1] -378.37 ± 1.08
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