C/2014 AA52 Catalina
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Comet C/2014 AA52 was discovered on 11 January 2014 by R.A. Kowalski during Catalina Sky Survey, that is about a year and two months before its perihelion passage, and was followed until 20 September 2015. This comet had closest approach to the Earth on 24 December 2014 (2.08 au, almost two months before the perihelion passage).
This is a comet with NG effects manifested in positional data fitting. Solutions 'a5' (GR) and 'n5' (NG, preferred) are based on data spanning over 1.7 yr in a range of heliocentric distances: 4.93 au – 2.00 au (perihelion) – 3.11 au.
This Oort spike comet suffers tiny planetary perturbations while passing through the planetary system; these perturbations lead to a slightly more tight future orbit, still inside the Oort Cloud (see future barycentric orbits).
This is a comet with NG effects manifested in positional data fitting. Solutions 'a5' (GR) and 'n5' (NG, preferred) are based on data spanning over 1.7 yr in a range of heliocentric distances: 4.93 au – 2.00 au (perihelion) – 3.11 au.
This Oort spike comet suffers tiny planetary perturbations while passing through the planetary system; these perturbations lead to a slightly more tight future orbit, still inside the Oort Cloud (see future barycentric orbits).
| solution description | ||
|---|---|---|
| number of observations | 403 | |
| data interval | 2014 01 04 – 2015 09 20 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 4.93 au – 2.00 au (perihelion) – 3.11 au | |
| type of model of motion | NS - non-gravitational orbits for standard g(r) | |
| data weighting | YES | |
| number of residuals | 784 | |
| RMS [arcseconds] | 0.38 | |
| orbit quality class | 1a | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2015 02 27 | |
| perihelion date | 2015 02 27.64789258 | ± 0.00010733 |
| perihelion distance [au] | 2.00259602 | ± 0.00000126 |
| eccentricity | 1.00045673 | ± 0.00000307 |
| argument of perihelion [°] | 292.263321 | ± 0.000041 |
| ascending node [°] | 330.493214 | ± 0.000007 |
| inclination [°] | 105.211243 | ± 0.000017 |
| reciprocal semi-major axis [10-6 au-1] | -228.07 | ± 1.54 |
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).
| non-gravitational parameters | ||
|---|---|---|
| A1 [10-8au/day2] | -0.45191 | ± 0.15633 |
| A2 [10-8au/day2] | 0.97223 | ± 0.13522 |
| A3 [10-8au/day2] | -0.55507 | ± 0.02634 |
| m | -2.15 | |
| n | 5.093 | |
| k | -4.6142 | |
| r0 [au] | 2.808 | |
| α | 0.1113 | |