C/2010 R1 old solution

Solar System
Dynamics &
Planetology
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C/2010 R1 LINEAR

General description

Comet C/2010 R1 was discovered 1.7 yr before perihelion passage.

Comet had its closest approach to Earth on 10 May 2012 (4.694 au, eight days before perihelion).

C/2010 R1 suffered a very slight planetary perturbations during its passage through the planetary system.

Solution given below is based on observations taken prior to 2013 June 5. Solution based on longer observational arc is available here.

Figure caption: 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.

SSDP Cometary Note C2010R1A5-001 – older solution

Comet C/2010 R1 LINEAR

number of observations	1574
number of residuals	3106
data interval	2010 Sep. 4 — 2013 June 5
rms [arcsec]	0.43
orbit quality class	1a+

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT)	20120602.0	= JD 2456080.5
time of perihelion passage (TT)	20120518.897264	± 0.000329
perihelion distance	5.62142117	± 0.00000251
eccentricity	1.00366427	± 0.00000290
argument of perihelion [deg]	114.496326	± 0.000037
longitude of the ascending node [deg]	343.649456	± 0.000017
inclination [deg]	156.933395	± 0.000004
inverse semimajor axis [10^-6 au^-1]	-651.84	± 0.52

Note: Epoch is given in a format: yyyymmdd.d, time of perihelion passage in a format of yyyymmdd.dddddd.

Original orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	17050831
time of perihelion passage (TT)	20120518.570947	± 0.000333
perihelion distance	5.62134619	± 0.00000249
eccentricity	0.99975559	± 0.00000290
argument of perihelion [deg]	114.531799	± 0.000037
longitude of the ascending node [deg]	343.648214	± 0.000017
inclination [deg]	156.925538	± 0.000004
inverse semimajor axis [10^-6 au^-1]	43.48	± 0.52

Note: Values of uncertainties of original/future orbital elements were derived using a swarm of 5001 osculating orbits of VCs (including the nominal osculating orbit given above) for original/future orbital evolution calclulations and then by fitting the distribution of a given orbital element of original/future swarm of VCs to Gaussian distribution.

Original barycentric positions and velocities of 5001 VCs at 250 au from the Sun are given here (data format), i.e. before entering the planetary zone.

Future orbital elements (barycentric; at 250 au from the Sun)

Epoch (TT)	23190704
time of perihelion passage (TT)	20120518.214822	± 0.000333
perihelion distance	5.62509170	± 0.00000250
eccentricity	0.99957374	± 0.00000290
argument of perihelion [deg]	114.528021	± 0.000037
longitude of the ascending node [deg]	343.702395	± 0.000017
inclination [deg]	156.950481	± 0.000004
inverse semimajor axis [10^-6 au^-1]	75.78	± 0.52