[ hide orbit diagram ]
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.|
If the applet has stopped working because of a recent Java upgrade,
here is a possible workaround.
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).
[ show covariance matrix ]
|Orbital Elements at Epoch 2456799.5 (2014-May-22.0) TDB |
Reference: JPL 39 (heliocentric ecliptic J2000)
| Element ||Value ||Uncertainty (1-sigma) || Units |
|e ||.1850207770465562 ||4.7955e-07 || |
|a ||4.606111568633298 ||1.2209e-06 ||AU|
|q ||3.753885227041634 ||3.1634e-06 ||AU|
|i ||20.15632999420141 ||2.1152e-05 ||deg|
|node ||94.20597607904955 ||2.2434e-05 ||deg|
|peri ||12.08068314388462 ||7.8425e-05 ||deg|
|M ||25.81482683012296 ||5.6115e-05 ||deg|
|tp ||2456540.579270503882 |
|period ||3610.772337617826 |
|n ||.09970166112369927 ||3.9641e-08 ||deg/d|
|Q ||5.458337910224962 ||1.4468e-06 ||AU|| ||Orbit Determination Parameters
|121P/Shoemaker-Holt 2 Discovered 1989-Mar-09 by Shoemaker, Carolyn & Eugene, & Holt, Henry at Palomar Mountain Observatory, California (675)|
|discovered on plate/photo taken on discovery date|
|Reference: comet.dis||Last Updated: 2003-08-29|
[ show close-approach data ]
| Perihelion |
| New-Style |
| 1993.9 || 121P/1989 E2 || || 1989j |
| 1984.0 || || 1988 XI || |