C/2013 S1 Catalina
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Comet C/2013 S1 was discovered on 28 September 2013 during the Catalina Sky Survey, that is less than two months after its perihelion passage. Comet was followed only two months to November 26. Comet had its closest approach to the Earth on 26 October 2013 (2.00 au, almost one month after discovery).
GR solution given here is based on data spanning over 0.16 yr in the post perihelion leg of orbit in the range of heliocentric distances from 2.88 au to 3.06 au. Due to short data arc the NG orbit is not possible to obtain.
This is comet outside the Oort spike with semimajor axis of about 2900 au. This comet suffers moderate planetary perturbations while passing through the planetary system and these perturbations lead to a tight orbit with semimajor axis of about 1400 au (see future barycentric orbits).
GR solution given here is based on data spanning over 0.16 yr in the post perihelion leg of orbit in the range of heliocentric distances from 2.88 au to 3.06 au. Due to short data arc the NG orbit is not possible to obtain.
This is comet outside the Oort spike with semimajor axis of about 2900 au. This comet suffers moderate planetary perturbations while passing through the planetary system and these perturbations lead to a tight orbit with semimajor axis of about 1400 au (see future barycentric orbits).
| solution description | ||
|---|---|---|
| number of observations | 109 | |
| data interval | 2013 09 28 – 2013 11 26 | |
| data type | observed only after perihelion (POST) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 2.88 au – 3.06au | |
| 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 | 218 | |
| RMS [arcseconds] | 0.58 | |
| orbit quality class | 2b | |
| orbital elements (barycentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 1708 03 08 | |
| perihelion date | 2013 08 02.82566097 | ± 0.01666688 |
| perihelion distance [au] | 2.82252050 | ± 0.00014790 |
| eccentricity | 0.99902815 | ± 0.00029008 |
| argument of perihelion [°] | 166.074965 | ± 0.005260 |
| ascending node [°] | 221.479907 | ± 0.000898 |
| inclination [°] | 83.944832 | ± 0.004046 |
| reciprocal semi-major axis [10-6 au-1] | 344.32 | ± 102.79 |
| file containing 5001 VCs swarm |
|---|
| 2013s1a5.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.