C/2015 X5 PANSTARRS
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Comet C/2015 X5 was discovered on 6 December 2015 with Pan-STARRS 1 telescope (Haleakala), that is almost 2 years before its perihelion passage.
Comet had its closest approach to the Earth on 4 January 2018 (5.909 au); 4 days after its perihelion passage.
The preferred solution given here is based on data spanning over 4.19 yr in a range of heliocentric distances: 8.38 au – 6.80 au (perihelion) – 8.45 au.
This Oort spike comet suffers tiny planetary perturbations.
Comet had its closest approach to the Earth on 4 January 2018 (5.909 au); 4 days after its perihelion passage.
The preferred solution given here is based on data spanning over 4.19 yr in a range of heliocentric distances: 8.38 au – 6.80 au (perihelion) – 8.45 au.
This Oort spike comet suffers tiny planetary perturbations.
| solution description | ||
|---|---|---|
| number of observations | 171 | |
| data interval | 2015 12 06 – 2018 02 08 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 8.38 au – 6.80 au (perihelion) – 6.81 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 | 332 | |
| RMS [arcseconds] | 0.22 | |
| orbit quality class | 1a+ | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1709 01 22 | |
| perihelion date | 2017 12 30.04729238 | ± 0.00094211 |
| perihelion distance [au] | 6.80457845 | ± 0.00000510 |
| eccentricity | 0.99959669 | ± 0.00000391 |
| argument of perihelion [°] | 27.662350 | ± 0.000074 |
| ascending node [°] | 122.248860 | ± 0.000004 |
| inclination [°] | 124.311556 | ± 0.00001 |
| reciprocal semi-major axis [10-6 au-1] | 59.27 | ± 0.57 |
| file containing 5001 VCs swarm |
|---|
| 2015x5a5.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).
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.