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12310 Londontario (1992 DE4)
Classification: Main-belt Asteroid          SPK-ID: 2012310
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

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).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1874746978635251 5.6192e-08  
a 2.732443012129515 1.9395e-08 au
q 2.220179084001233 1.5708e-07 au
i 1.702645959622201 6.2417e-06 deg
node 141.3510019890734 0.0001613 deg
peri 225.8656191589704 0.00016222 deg
M 288.0770262121663 1.6482e-05 deg
tp 2457930.102298415263
7.7342e-05 JED
period 1649.77643693546
n .218211384245927 2.3233e-09 deg/d
Q 3.244706940257796 2.3031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      925  
   data-arc span      14170 days (38.80 yr)  
   first obs. used      1976-09-25  
   last obs. used      2015-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52453  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:49:26  

Additional Information
 Earth MOID = 1.21817 au 
 Jupiter MOID = 2.20827 au 
 T_jup = 3.327 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a PDS3 (MPC 36689)  

12310 Londontario           Discovered 1992 Feb. 29 by Spacewatch at Kitt Peak.
The Canadian city of London, Ontario, founded in 1854, is located at the fork of the Thames River, midway between Lake Erie and Lake Huron. It is a center of education, health care and commerce. The name was suggested by P. Jedicke and R. Jedicke.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

[ show close-approach data ]
Alternate Designations
 1992 DE4 = 1976 SJ7 = 1985 RW5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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