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117918 (4320 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117918
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1190289313381284 4.9864e-08  
a 3.043152299276869 3.3206e-08 au
q 2.680929133194775 1.5377e-07 au
i 14.5703918581038 6.5617e-06 deg
node 2.148519717306038 1.6468e-05 deg
peri 40.03935837625617 3.1756e-05 deg
M 58.4783484804658 2.6659e-05 deg
tp 2458685.524657509927
(2019-Jul-21.02465751)
0.00014157 TDB
period 1939.027456192676
5.31
3.1737e-05
8.689e-08
d
yr
n .1856600837962698 3.0388e-09 deg/d
Q 3.405375465358962 3.7158e-08 au
  Orbit Determination Parameters
   # obs. used (total)      450  
   data-arc span      21679 days (59.35 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53747  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:51:47  

Additional Information
 Earth MOID = 1.70374 au 
 Jupiter MOID = 2.13269 au 
 T_jup = 3.180 
[ show covariance matrix ]

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 15.2   n/a MPO453650  
diameter diameter 5.814 km 0.182 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117918 (4320 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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