C/2015 B2 PANSTARRS
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Comet C/2015 B2 was discovered on 29 January 2015 with Pan-STARRS 1 telescope (Haleakala), that is about 1.3 yr before its perihelion passage; a few prediscovery images of this comet were found (taken on 6 January with the same survey). This comet was observed until 12 September 2017.
Comet had its closest approach to the Earth on 12 January 2016 (3.625 au), about 4 months before its perihelion passage.
Solution given here is based on data spanning over 2.68 yr in a range of heliocentric distances: 5.48 au – 3.370 au (perihelion) – 5.53 au.
This comet suffers tiny planetary perturbations during its passage through the planetary system; have orignal semimajor axis of about 4,400 au and slightly tighter future orbit (see future barycentric orbit).
Comet had its closest approach to the Earth on 12 January 2016 (3.625 au), about 4 months before its perihelion passage.
Solution given here is based on data spanning over 2.68 yr in a range of heliocentric distances: 5.48 au – 3.370 au (perihelion) – 5.53 au.
This comet suffers tiny planetary perturbations during its passage through the planetary system; have orignal semimajor axis of about 4,400 au and slightly tighter future orbit (see future barycentric orbit).
| solution description | ||
|---|---|---|
| number of observations | 242 | |
| data interval | 2015 01 06 – 2017 09 12 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 5.48 au – 3.37 au (perihelion) – 5.53 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 | 464 | |
| RMS [arcseconds] | 0.23 | |
| orbit quality class | 1a+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2016 05 12 | |
| perihelion date | 2016 05 06.57808382 | ± 0.00007412 |
| perihelion distance [au] | 3.36959203 | ± 0.00000030 |
| eccentricity | 1.00039942 | ± 0.00000120 |
| argument of perihelion [°] | 284.769686 | ± 0.000010 |
| ascending node [°] | 341.902052 | ± 0.000005 |
| inclination [°] | 105.08811 | ± 0.000006 |
| reciprocal semi-major axis [10-6 au-1] | -118.54 | ± 0.35 |
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).