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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2090128220097971 4.3375e-08  
a 3.167929967993454 2.0064e-08 au
q 2.505791985453736 1.3918e-07 au
i .8411332480531625 3.9923e-06 deg
node 54.22646939727525 0.00034515 deg
peri 323.8998376882147 0.0003453 deg
M 271.2221210059647 1.1995e-05 deg
tp 2459108.383436527844
(2020-Sep-15.88343653)
7.0887e-05 TDB
period 2059.499947755095
5.64
1.9565e-05
5.357e-08
d
yr
n .1747997131014296 1.6606e-09 deg/d
Q 3.830067950533172 2.4257e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1197  
   data-arc span      9400 days (25.74 yr)  
   first obs. used      1992-10-19  
   last obs. used      2018-07-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56334  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:21:31  

Additional Information
 Earth MOID = 1.50711 au 
 Jupiter MOID = 1.62946 au 
 T_jup = 3.168 
[ 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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