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

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1879145759444463 3.842e-08  
a 2.731884331010898 1.1236e-08 au
q 2.218523445419708 1.0525e-07 au
i 1.702872564916693 3.6871e-06 deg
node 141.347582493749 0.0001463 deg
peri 225.5915880751809 0.00014661 deg
M 233.8637344132985 1.0804e-05 deg
tp 2459578.368945131437
(2021-Dec-29.86894513)
5.1354e-05 TDB
period 1649.270487592825
4.52
1.0175e-05
2.786e-08
d
yr
n .2182783253009238 1.3467e-09 deg/d
Q 3.245245216602088 1.3348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1473  
   data-arc span      15978 days (43.75 yr)  
   first obs. used      1976-09-25  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5433  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:53:50  

Additional Information
 Earth MOID = 1.2176 au 
 Jupiter MOID = 2.21535 au 
 T_jup = 3.327 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO435817  
diameter diameter 8.361 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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Alternate Designations
 1992 DE4 = 1976 SJ7 = 1985 RW5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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