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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082558686178549 4.2452e-08  
a 3.162222844229817 1.7579e-08 au
q 2.503671379041513 1.3503e-07 au
i .840113759592591 3.9493e-06 deg
node 54.14530353051799 0.00034209 deg
peri 324.3882339364431 0.00034223 deg
M 340.8051811181257 1.1405e-05 deg
tp 2459110.013750459280
(2020-Sep-17.51375046)
6.5427e-05 TDB
period 2053.937075830909
5.62
1.7127e-05
4.689e-08
d
yr
n .1752731396867959 1.4616e-09 deg/d
Q 3.820774309418121 2.124e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1281  
   data-arc span      10151 days (27.79 yr)  
   first obs. used      1992-10-19  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:48:20  

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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