C/2016 A1 PANSTARRS
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Comet C/2016 A1 was discovered on 1 January 2016 with Pan-STARRS 1 telescope (Haleakala), that is about almost 2 yr before its perihelion passage, and was next observed until 15 February 2020.
Comet had its closest approach to the Earth on 17 January 2018 (4.397 au); about 2 months after its perihelion passage.
Solutions given here are based on data spanning over 4.12 yr in a range of heliocentric distances: 7.31 au 5.328 au (perihelion) – 7.90 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska and Dones 2023.
Comet had its closest approach to the Earth on 17 January 2018 (4.397 au); about 2 months after its perihelion passage.
Solutions given here are based on data spanning over 4.12 yr in a range of heliocentric distances: 7.31 au 5.328 au (perihelion) – 7.90 au.
This Oort spike comet suffers small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska and Dones 2023.
solution description | ||
---|---|---|
number of observations | 974 | |
data interval | 2016 01 01 – 2017 11 22 | |
data arc selection | data generally limited to pre-perihelion (PRE) | |
range of heliocentric distances | 7.31 au – 5.33au | |
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 | 1911 | |
RMS [arcseconds] | 0.35 | |
orbit quality class | 1a |
orbital elements (heliocentric ecliptic J2000) | ||
---|---|---|
Epoch | 2017 11 23 | |
perihelion date | 2017 11 23.36615688 | ± 0.00054511 |
perihelion distance [au] | 5.32780197 | ± 0.00000339 |
eccentricity | 1.00200419 | ± 0.00000292 |
argument of perihelion [°] | 10.319545 | ± 0.000066 |
ascending node [°] | 128.174534 | ± 0.000006 |
inclination [°] | 121.185703 | ± 0.000009 |
reciprocal semi-major axis [10-6 au-1] | -376.18 | ± 0.55 |
![](media/img/2016a1/2016a1para_res_weights.png)
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).
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).