Solar System
Dynamics &
Planetology
Group 		C/1956 R1 Arend–Roland


SSDP Cometary Note C1956R1N1-001

Comet C/1956 R1 Arend–Roland

number of observations 249
number of residuals 458
data interval 1956 Nov. 8 — 1958 Apr. 11
rms [arcsec] 1.39
orbit quality class 1b

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19561014.0 = JD 2435760.5
time of perihelion passage (TT) 19570408.028353 ± 0.000158
perihelion distance 0.31598046 ± 0.00000245
eccentricity 1.00021561 ± 0.00000369
argument of perihelion [deg] 308.783333 ± 0.000334
longitude of the ascending node [deg] 215.856589 ± 0.000090
inclination [deg] 119.939289 ± 0.000075
inverse semimajor axis [10-6 au-1] -682.34 ± 11.68

Nongravitational parameters [10-8 au/day2] A1 = 1.948 ± 0.139 A2 = 0.1123 ± 0.0223 A3 = 0.3728 ± 0.0873

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) 16600319
time of perihelion passage (TT) 19570408.524057 ± 0.003917
perihelion distance 0.31732219 ± 0.00000252
eccentricity 0.99999671 ± 0.00000363
argument of perihelion [deg] 308.755188 ± 0.000333
longitude of the ascending node [deg] 215.775015 ± 0.000087
inclination [deg] 119.986140 ± 0.000075
inverse semimajor axis [10-6 au-1] 10.37 ± 11.42

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) 22471228
time of perihelion passage (TT) 19570408.428079 ± 0.000086
perihelion distance 0.31297901 ± 0.00000240
eccentricity 1.00018143 ± 0.00000312
argument of perihelion [deg] 308.814505 ± 0.000342
longitude of the ascending node [deg] 216.076797 ± 0.000070
inclination [deg] 119.901340 ± 0.000054
inverse semimajor axis [10-6 au-1] -579.69 ± 9.97


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





Solar System Dynamics & Planetology Group, 2013. All rights reserved

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