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| Orbit Diagram
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| Note:
Make sure you have Java enabled on your browser to see the applet.
This applet is provided as a 3D orbit visualization tool.
The applet was implemented using 2-body methods,
and hence should not be used for determining accurate long-term trajectories
(over several years or decades) or planetary encounter circumstances.
For accurate long-term ephemerides, please instead use our Horizons system. |
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Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.
Orbit Viewer applet originally written and kindly provided by
Osamu Ajiki (AstroArts),
and further modified by
Ron Baalke (JPL).
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Orbital Elements at Epoch 2456364.5 (2013-Mar-13.0) TDB
Reference: JPL K123/5 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .7068959571305257 | 1.2944e-07 | |
| a | 3.515852288498695 | 1.1487e-07 | AU |
| q | 1.030510519890861 | 4.4882e-07 | AU |
| i | 31.90986189089459 | 1.705e-05 | deg |
| node | 195.3941516560791 | 3.3588e-05 | deg |
| peri | 172.5883270219408 | 4.3809e-05 | deg |
| M | 59.10203345619887 | 8.7096e-06 | deg |
| tp | 2455969.184101620009
(2012-Feb-11.68410162) | 4.5401e-05 | JED |
| period | 2407.932774804896
6.59 | 0.00011801
3.231e-07 | d
yr |
| n | .1495058349497191 | 7.3269e-09 | deg/d |
| Q | 6.00119405710653 | 1.9607e-07 | AU |
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Additional Model Parameters
| Parameter | Value | Uncertainty (1-sigma) |
| A1 [EST] | 3.260103128285035E-9 | 4.769E-11 |
| A2 [EST] | -4.586780336285469E-10 | 1.581E-11 |
| A3 [EST] | -9.557319222111897E-10 | 4.469E-11 |
| DT [EST] | -31.9058825479079 | .6752 |
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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 |
10.5 |
mag |
1. |
K123/5 |
2 parameter fit from 470 observations, autocmod 2.5b |
| comet total magnitude slope |
K1 |
15. |
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n/a |
K123/5 |
autocmod 2.5b |
| diameter |
diameter |
2.0 |
km |
n/a |
Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264 |
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| 21P/Giacobini-Zinner Discovered 1900-Dec-20 by Giacobini, M. at Nice Observatory, France |
| 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 | | 1992.3 | | 1992 IX | 1991m |
| 1985.7 | | 1985 XIII | 1984e |
| 1979.2 | | 1979 III | 1978h |
| 1972.6 | | 1972 VI | 1972d |
| 1966.0 | | 1966 I | 1965g |
| 1959.4 | | 1959 VIII | 1959b |
| 1946.2 | | 1946 V | 1946c |
| 1939.6 | | 1940 I | 1939l |
| 1933.0 | | 1933 III | 1933c |
| 1926.4 | | 1926 VI | 1926e |
| 1913.2 | 21P/1913 U1 | 1913 V | 1913e |
| 1900.0 | 21P/1900 Y1 | 1900 III | 1900c |
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