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JPL Small-Body Database Browser
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17713 (1997 WJ20)
Classification: Main-belt Asteroid          SPK-ID: 2017713
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 .08159187579000138 3.0785e-08  
a 2.400856761869282 9.4955e-09 au
q 2.204966355165259 7.6421e-08 au
i 4.495542518407556 3.931e-06 deg
node 218.7195319707559 4.5219e-05 deg
peri 250.9249853790782 5.245e-05 deg
M 226.0506909744069 2.7806e-05 deg
tp 2459106.075219598370
(2020-Sep-13.57521960)
0.00010569 TDB
period 1358.77579645176
3.72
8.061e-06
2.207e-08
d
yr
n .2649443719413359 1.5718e-09 deg/d
Q 2.596747168573306 1.027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1145  
   data-arc span      9547 days (26.14 yr)  
   first obs. used      1993-10-10  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50344  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:22:04  

Additional Information
 Earth MOID = 1.22676 au 
 Jupiter MOID = 2.49326 au 
 T_jup = 3.517 
[ 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 15.2   n/a MPO502304  
diameter diameter 2.616 km 0.518 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.109 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17713 (1997 WJ20)          Discovered 1997-Nov-25 by Spacewatch at Kitt Peak
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WJ20 = 1993 TC42 = 1999 GD49 = 2000 NX12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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