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13381 (1998 WJ17)
Classification: Outer Main-belt Asteroid          SPK-ID: 2013381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .214240390915022 4.1195e-08  
a 4.002076864989138 4.3456e-08 au
q 3.144670352961899 1.814e-07 au
i 4.198766394047681 5.2054e-06 deg
node 233.8001156631133 6.0385e-05 deg
peri 81.76199087242121 6.1643e-05 deg
M 359.0346105146392 1.4057e-05 deg
tp 2459208.341996222920
(2020-Dec-24.84199622)
0.00011425 TDB
period 2924.331249781496
8.01
4.763e-05
1.304e-07
d
yr
n .1231050689031549 2.0051e-09 deg/d
Q 4.859483377016376 5.2766e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1538  
   data-arc span      12631 days (34.58 yr)  
   first obs. used      1986-04-02  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52807  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:52:55  

Additional Information
 Earth MOID = 2.13298 au 
 Jupiter MOID = .587444 au 
 T_jup = 3.009 
[ 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 12.39   n/a E2021B10  
diameter diameter 15.728 km 0.557 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
geometric albedo albedo 0.103   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  

13381 (1998 WJ17)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20000124/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WJ17 = 1989 SB7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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