Solar System
Dynamics &
Planetology
Group 		C/1996 E1 NEAT


SSDP Cometary Note C1996E1N1-001

Comet C/1996 E1 NEAT

number of observations 249
number of residuals 492
data interval 1996 Mar. 15 — 1996 Oct. 12
rms [arcsec] 0.60
orbit quality class 1b

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19960207.0 = JD 2450120.5
time of perihelion passage (TT) 19960727.353176 ± 0.000201
perihelion distance 1.35878564 ± 0.00000638
eccentricity 1.00078927 ± 0.00000621
argument of perihelion [deg] 81.117630 ± 0.000330
longitude of the ascending node [deg] 149.841680 ± 0.000036
inclination [deg] 114.473289 ± 0.000027
inverse semimajor axis [10-6 au-1] -580.86 ± 4.57

Nongravitational parameters [10-8 au/day2] A1 = 6.688 ± 0.311 A2 = 0.6883 ± 0.0936 A3 = 0.0 (assumed)
Notes: 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) 16970613
time of perihelion passage (TT) 19960727.311034 ± 0.000153
perihelion distance 1.36236744 ± 0.00000644
eccentricity 0.99995892 ± 0.00000621
argument of perihelion [deg] 81.089949 ± 0.000331
longitude of the ascending node [deg] 149.760222 ± 0.000036
inclination [deg] 114.474859 ± 0.000027
inverse semimajor axis [10-6 au-1] 30.15 ± 4.56

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) 22990728
time of perihelion passage (TT) 19960729.365833 ± 0.000514
perihelion distance 1.34394188 ± 0.00000722
eccentricity 0.99950431 ± 0.00000731
argument of perihelion [deg] 80.790883 ± 0.000614
longitude of the ascending node [deg] 149.918175 ± 0.000036
inclination [deg] 114.714647 ± 0.000025
inverse semimajor axis [10-6 au-1] 368.83 ± 5.44


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

\