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11218 (1999 JD20)
Classification: Main-belt Asteroid          SPK-ID: 2011218
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1256873724758075 3.8887e-08  
a 3.037201917022238 1.4761e-08 au
q 2.655463988393227 1.1979e-07 au
i 4.133499081347161 3.9974e-06 deg
node 248.819800594074 5.0317e-05 deg
peri 333.2783564343278 5.1964e-05 deg
M 351.2664450866818 1.2201e-05 deg
tp 2459047.402660617520
(2020-Jul-16.90266062)
6.5484e-05 TDB
period 1933.34306475345
5.29
1.4094e-05
3.859e-08
d
yr
n .186205959285301 1.3574e-09 deg/d
Q 3.418939845651248 1.6616e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2004  
   data-arc span      18514 days (50.69 yr)  
   first obs. used      1969-10-08  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52289  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 17:13:17  

Additional Information
 Earth MOID = 1.64764 au 
 Jupiter MOID = 1.57626 au 
 T_jup = 3.225 
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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 13.2   n/a MPO344392  
diameter diameter 12.576 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11218 (1999 JD20)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 19990728/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 JD20 = 1969 TU7 = 1988 JK1 = 1993 BD8 = 1994 LO4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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