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JPL Small-Body Database Browser
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13987 (1992 WK9)
Classification: Main-belt Asteroid          SPK-ID: 2013987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .208255867715916 4.3057e-08  
a 3.162222852323272 1.8898e-08 au
q 2.50367138830159 1.3795e-07 au
i .8401106936381942 3.976e-06 deg
node 54.14540560020929 0.00034497 deg
peri 324.3881256635739 0.00034511 deg
M 340.8051826040565 1.2424e-05 deg
tp 2459110.013742401916
(2020-Sep-17.51374240)
7.1353e-05 TDB
period 2053.937083716239
5.62
1.8412e-05
5.041e-08
d
yr
n .1752731390138997 1.5712e-09 deg/d
Q 3.820774316344954 2.2834e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1204  
   data-arc span      9839 days (26.94 yr)  
   first obs. used      1992-10-19  
   last obs. used      2019-09-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56648  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:46:00  

Additional Information
 Earth MOID = 1.50588 au 
 Jupiter MOID = 1.64157 au 
 T_jup = 3.170 
[ 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 13.8   n/a MPO439190  
diameter diameter 8.501 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.081   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13987 (1992 WK9)          Discovered 1992-Nov-16 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1992 WK9 = 1981 UP = 1986 PS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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