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20387 (1998 KP54)
Classification: Main-belt Asteroid          SPK-ID: 2020387
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1529736683083462 4.4859e-08  
a 2.776586795535869 1.6509e-08 au
q 2.351842128046231 1.2681e-07 au
i 13.85930226111616 4.9587e-06 deg
node 97.36135802887922 2.0501e-05 deg
peri 233.5422943572552 2.5801e-05 deg
M 122.9046216386705 1.6181e-05 deg
tp 2458023.559507099000
(2017-Sep-27.05950710)
7.6048e-05 TDB
period 1689.916739298681
4.63
1.5072e-05
4.126e-08
d
yr
n .2130282466752775 1.9e-09 deg/d
Q 3.201331463025507 1.9035e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1316  
   data-arc span      10574 days (28.95 yr)  
   first obs. used      1990-10-25  
   last obs. used      2019-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52227  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:23:05  

Additional Information
 Earth MOID = 1.36708 au 
 Jupiter MOID = 2.16288 au 
 T_jup = 3.276 
[ 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 13.5   n/a MPO384929  
diameter diameter 11.086 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20387 (1998 KP54)          Discovered 1998-May-23 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 KP54 = 1990 WS9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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