C/2015 O1 PANSTARRS
more info
Comet C/2015 O1 was discovered on 19 July 2015 with Pan-STARRS 1 telescope (Haleakala), that is about months after its perihelion passage.
Some prediscovery images of this comet were found: taken on 15 and 17 of June 2015 by Space Surveillance Telescope (Atom Site).
Solutions given here are based on data spanning over 4.76 yr in a range of heliocentric distances: 8.65 au – 3.730 au (perihelion) – 7.28 au.
NG orbits using full data-arc as well as independently using pre-perihelion and post-perihelion data are determinable.
See also Królikowska and Dones 2023.
| solution description | ||
|---|---|---|
| number of observations | 325 | |
| data interval | 2015 06 11 – 2016 11 02 | |
| data arc selection | data generally limited to pre-perihelion (PRE) | |
| range of heliocentric distances | 8.65 au – 5.5au | |
| detectability of NG effects in the comet's motion | comet with NG effects strongly manifested in positional data fitting | |
| type of model of motion | GR - gravitational orbit | |
| data weighting | YES | |
| number of residuals | 644 | |
| RMS [arcseconds] | 0.39 | |
| orbit quality class | 1a | |
| previous orbit statistics, both Galactic and stellar perturbations were taken into account | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 31.11 – 32.76 – 34.45 | |
| previous perihelion distance [au] | 220 – 270 – 310 | |
| previous aphelion distance [103 au] | 57.8 – 60.8 – 64 | |
| time interval to previous perihelion [Myr] | 4.24 – 4.62 – 5.02 | |
| percentage of VCs with qprev > 20 | 100 | |
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).
| previous orbit statistics, here only the Galactic tide has been included | ||
|---|---|---|
| no. of returning VCs in the swarm | 5001 | * |
| no. of escaping VCs in the swarm | 0 | |
| no. of hyperbolas among escaping VCs in the swarm | 0 | |
| previous reciprocal semi-major axis [10-6 au-1] | 31.29 – 33.59 – 36.06 | |
| previous perihelion distance [au] | 18 – 24 – 33 | |
| previous aphelion distance [103 au] | 55.4 – 59.5 – 63.9 | |
| time interval to previous perihelion [Myr] | 4.53 – 5.01 – 5.55 | |
| percentage of VCs with 10 < qprev < 20 | 22 | |
| percentage of VCs with qprev > 20 | 78 | |