C/2015 O1 PANSTARRS
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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 | 2239 | |
data interval | 2018 02 21 – 2020 03 20 | |
data arc selection | data generally limited to post-perihelion (POS) | |
range of heliocentric distances | 3.73 au – 7.28au | |
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 | 4459 | |
RMS [arcseconds] | 0.54 | |
orbit quality class | 1a+ |
orbital elements (heliocentric ecliptic J2000) | ||
---|---|---|
Epoch | 2018 03 23 | |
perihelion date | 2018 02 19.02116315 | ± 0.00017545 |
perihelion distance [au] | 3.72963659 | ± 0.00000130 |
eccentricity | 0.99998105 | ± 0.00000162 |
argument of perihelion [°] | 89.593317 | ± 0.000036 |
ascending node [°] | 299.857627 | ± 0.000008 |
inclination [°] | 127.210943 | ± 0.000006 |
reciprocal semi-major axis [10-6 au-1] | 5.08 | ± 0.44 |
![](media/img/2015o1/2015o1para_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).