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 1 January 2020.

Comet had its closest approach to the Earth on 10 April 2017 (7.345 au), almost 2 months before its perihelion passage.

The preferred solution given here is based on data spanning over 3.83 yr in a range of heliocentric distances: 8.62 au – 8.18 au (perihelion) – 9.90 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 (barycentric ecliptic J2000)
Epoch 1706 04 28
perihelion date 2017 06 03.34160403 ± 0.00188950
perihelion distance [au] 8.15995561 ± 0.00001132
eccentricity 0.99965406 ± 0.00000867
argument of perihelion [°] 47.474402 ± 0.000110
ascending node [°] 233.045361 ± 0.000013
inclination [°] 132.068214 ± 0.000015
reciprocal semi-major axis [10-6 au-1] 42.39 ± 1.06
file containing 5001 VCs swarm
2016e1b5.bmi
Upper panel: 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.
Middle panel(s): O-C diagram for a given solution (sometimes in comparison to another solution available in CODE), where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lowest panel: Relative weights for a given data set(s).
Six 2D-projections of the 6D space of original swarm including 5001 VCs. Each density map is given in logarithmic scale presented on the right in the individual panel.