Solar System
Dynamics &
Planetology
Group 		C/1992 J1 Spacewatch


SSDP Cometary Note C1992J1A2-001

Comet C/1992 J1 Spacewatch

number of observations 248
number of residuals 494
data interval 1992 May 1 — 1995 Feb. 2
rms [arcsec] 0.79
orbit quality class 1a+

Osculating orbital elements (heliocentric; ecliptic J2000.0)

Epoch (TT) 19930910.0 = JD 2449240.5
time of perihelion passage (TT) 19930905.547819 ± 0.000205
perihelion distance 3.00700702 ± 0.00000103
eccentricity 0.99996278 ± 0.00000285
argument of perihelion [deg] 83.400999 ± 0.000042
longitude of the ascending node [deg] 203.324053 ± 0.000020
inclination [deg] 124.318707 ± 0.000019
inverse semimajor axis [10-6 au-1] 12.38 ± 0.95

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) 16910824
time of perihelion passage (TT) 19930904.172357 ± 0.000204
perihelion distance 3.00047429 ± 0.00000106
eccentricity 0.99991839 ± 0.00000281
argument of perihelion [deg] 83.453441 ± 0.000042
longitude of the ascending node [deg] 203.272834 ± 0.000020
inclination [deg] 124.287539 ± 0.000019
inverse semimajor axis [10-6 au-1] 27.20 ± 0.94

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) 23011115
time of perihelion passage (TT) 19930905.580473 ± 0.000215
perihelion distance 3.00381947 ± 0.00000105
eccentricity 0.99835796 ± 0.00000281
argument of perihelion [deg] 83.330856 ± 0.000042
longitude of the ascending node [deg] 203.421098 ± 0.000020
inclination [deg] 124.406370 ± 0.000019
inverse semimajor axis [10-6 au-1] 546.65 ± 0.93


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.





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