C/2015 R3 PANSTARRS
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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. After some time pre-discovery data were found going back to 5 March 2013. This comet was rarely observed until 28 September 2016.
Comet had its closest approach to the Earth on 8 May 2015 (4.939 au), a week after its perihelion passage.
We recommended GR solution spanning over 3.57 yr in a range of heliocentric distances from 5.57 au – 4.90 au (perihelion) – 8.54 au as the preferred orbit( solution 'b1'), because radial component of NG~acceleration is negative in solution 'bc'.
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 larger than 10000 au (see future barycentric orbits).
Comet had its closest approach to the Earth on 8 May 2015 (4.939 au), a week after its perihelion passage.
We recommended GR solution spanning over 3.57 yr in a range of heliocentric distances from 5.57 au – 4.90 au (perihelion) – 8.54 au as the preferred orbit( solution 'b1'), because radial component of NG~acceleration is negative in solution 'bc'.
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 larger than 10000 au (see future barycentric orbits).
| solution description | ||
|---|---|---|
| number of observations | 36 | |
| data interval | 2015 09 12 – 2016 09 28 | |
| data arc selection | data generally limited to post-perihelion (POS) | |
| range of heliocentric distances | 6.56 au – 8.54au | |
| detectability of NG effects in the comet's motion | comet with determinable NG~orbit | |
| 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 |
| reciprocal 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.