C/2005 L3 McNaught
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C/2005 L3 was discovered by Robert LH. McNaught with the 0.5-m Uppsala Schmidt in the course of the Siding Spring Survey on 3 June 2005 [IAUC 8536, 2005 June 7]. Later, prediscovery detections by Siding Spring Survey were found (16 July and 16 August 2004, see figure).
This comet made two closest approaches to the Earth on 24 June 2007 (4.852 au, almost seven months before perihelion) and 12 May 2008 (4.857 au, four months after perihelion).
Solution given here is based on data spanning over 8.7 yr (10 oppositions) in a range of heliocentric distances: 10.3 au – 5.593 au (perihelion) – 13.4 au. Currently, two more positions are available at the MPC (from 9 January 2014).
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.
This comet made two closest approaches to the Earth on 24 June 2007 (4.852 au, almost seven months before perihelion) and 12 May 2008 (4.857 au, four months after perihelion).
Solution given here is based on data spanning over 8.7 yr (10 oppositions) in a range of heliocentric distances: 10.3 au – 5.593 au (perihelion) – 13.4 au. Currently, two more positions are available at the MPC (from 9 January 2014).
This Oort spike comet suffers rather small planetary perturbations during its passage through the planetary system that lead to a more tight future orbit (see future barycentric orbit).
See also Królikowska 2014 and Królikowska and Dybczyński 2017.
| solution description | ||
|---|---|---|
| number of observations | 5337 | |
| data interval | 2004 07 16 – 2013 03 05 | |
| data type | perihelion within the observation arc (FULL) | |
| data arc selection | entire data set (STD) | |
| range of heliocentric distances | 10.3 au – 5.59 au (perihelion) – 13.4 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 | 10503 | |
| RMS [arcseconds] | 0.49 | |
| orbit quality class | 1a+ | |
| orbital elements (heliocentric ecliptic J2000) | ||
|---|---|---|
| Epoch | 2008 01 15 | |
| perihelion date | 2008 01 16.00585100 | ± 0.00008800 |
| perihelion distance [au] | 5.59327050 | ± 0.00000047 |
| eccentricity | 0.99991033 | ± 0.00000071 |
| argument of perihelion [°] | 47.096947 | ± 0.000009 |
| ascending node [°] | 288.739107 | ± 0.000004 |
| inclination [°] | 139.448742 | ± 0.000002 |
| recip semi-major axis [10-6 au-1] | 16.03 | ± 0.13 |
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.