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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.
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Orbital Elements at Epoch 2455809.5 (2011-Sep-05.0) TDB
Reference: JPL K162/9 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .5370707300610902 | 6.7506e-08 | |
a | 3.451863526325708 | 9.2066e-08 | au |
q | 1.597968662170711 | 2.6711e-07 | au |
i | 3.237247549683569 | 2.7021e-06 | deg |
node | 136.0976855407395 | 7.6059e-05 | deg |
peri | 41.75623208556019 | 7.9552e-05 | deg |
M | 85.97576116427592 | 9.05e-06 | deg |
tp | 2455250.061461002294 (2010-Feb-22.56146100) | 4.6752e-05 | TDB |
period | 2342.495969932252 6.41 | 9.3717e-05 2.566e-07 | d yr |
n | .1536822281109033 | 6.1484e-09 | deg/d |
Q | 5.305758390480706 | 1.4151e-07 | au |
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Additional Model Parameters
Parameter | Value | Uncertainty (1-sigma) |
A1 [EST] | 1.791197908396128E-9 | 5.377E-11 |
A2 [EST] | 3.027992287262192E-11 | 2.95E-11 |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
comet total magnitude |
M1 |
8.8 |
|
1. |
K162/9 |
2 parameter fit from 552 observations, autocmod 2.6n |
comet total magnitude slope |
K1 |
14. |
|
n/a |
K162/9 |
autocmod 2.6n |
comet nuclear magnitude |
M2 |
13.1 |
|
0.8 |
K162/9 |
from 3263 observations, autocmod 2.6n |
comet nuclear magnitude slope |
K2 |
5. |
|
n/a |
K162/9 |
autocmod 2.6n |
comet nuclear phase coefficient |
PC |
0.03 |
|
n/a |
K162/9 |
autocmod 2.6n |
diameter |
diameter |
4.0 |
km |
n/a |
Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264 |
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81P/Wild 2 Discovered 1978-Jan-06 by Wild, Paul at Astronomical Institute of Berne, Switzerland |
discovered on plate/photo taken on discovery date as well as 1/8 |
Reference: comet.dis | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
Perihelion Year (est.) | New-Style Desig | Roman Numeral | Year/ Letter | 1990.9 | | 1990 XXVIII | 1989t |
1984.5 | 81P/1983 S1 | 1984 XIV | 1983s |
1978.1 | 81P/1978 A2 | 1978 XI | 1978b |
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