C/2011 R1 McNaught
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Comet C/2011 R1 was discovered on 3 September 2011 by Robert H. McNaught (Siding Spring), that is more than a year before its perihelion passage. It was observed until 11 April 2014.
Comet had its closest approach to the Earth on 8 April 2013 (1.960 au), 5.5 months after its perihelion passage; however on 8 August 2012 (2.5 months before perihelion) the comet approached the Earth only a little further (2.035 au, see picture).
Solution given here is based on data spanning over 3.5 yr in a range of heliocentric distances: 7.47 au – 2.08 au (perihelion) – 5.91 au.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that cause a bit tighter future orbit with original semimajor axis of about 10,000 au (see future barycentric orbits).
See also Królikowska 2020.
Comet had its closest approach to the Earth on 8 April 2013 (1.960 au), 5.5 months after its perihelion passage; however on 8 August 2012 (2.5 months before perihelion) the comet approached the Earth only a little further (2.035 au, see picture).
Solution given here is based on data spanning over 3.5 yr in a range of heliocentric distances: 7.47 au – 2.08 au (perihelion) – 5.91 au.
This Oort spike comet suffers tiny planetary perturbations during its passage through the planetary system that cause a bit tighter future orbit with original semimajor axis of about 10,000 au (see future barycentric orbits).
See also Królikowska 2020.
solution description | ||
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number of observations | 1504 | |
data interval | 2010 10 11 – 2014 04 11 | |
data type | perihelion within the observation arc (FULL) | |
data arc selection | entire data set (STD) | |
range of heliocentric distances | 7.47 au – 2.08 au (perihelion) – 5.91 au | |
detectability of NG effects in the comet's motion | comet with determinable NG~orbit | |
type of model of motion | GR - gravitational orbit | |
data weighting | YES | |
number of residuals | 2989 | |
RMS [arcseconds] | 0.44 | |
orbit quality class | 1a+ |
orbital elements (barycentric ecliptic J2000) | ||
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Epoch | 1712 05 06 | |
perihelion date | 2012 10 19.12097110 | ± 0.00005143 |
perihelion distance [au] | 2.08327618 | ± 0.00000016 |
eccentricity | 0.99992743 | ± 0.00000051 |
argument of perihelion [°] | 308.760905 | ± 0.000008 |
ascending node [°] | 221.398441 | ± 0.000006 |
inclination [°] | 116.134408 | ± 0.000012 |
reciprocal semi-major axis [10-6 au-1] | 34.83 | ± 0.24 |
file containing 5001 VCs swarm |
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2011r1a5.bmi |
![](media/img/2011r1/2011r1n5a5res.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.
Lower panel (panels): O-C diagram for this(two) solution (solutions) given in this database, where residuals in right ascension are shown using magenta dots and in declination by blue open circles.
Lower panel (panels): O-C diagram for this(two) solution (solutions) given in this database, where residuals in right ascension are shown using magenta dots and in declination by blue open circles.