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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0817488804772899 2.7689e-08  
a 2.401588844888523 7.9907e-09 au
q 2.205261645452138 6.7138e-08 au
i 4.494867532675148 3.5452e-06 deg
node 218.7130126791029 4.4203e-05 deg
peri 250.6808435563039 5.0604e-05 deg
M 25.22629934301917 2.4676e-05 deg
tp 2459105.242877685875
(2020-Sep-12.74287769)
9.317e-05 TDB
period 1359.397332394484
3.72
6.7846e-06
1.858e-08
d
yr
n .2648232355774048 1.3217e-09 deg/d
Q 2.597916044324907 8.644e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1346  
   data-arc span      10018 days (27.43 yr)  
   first obs. used      1993-10-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48869  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:10:38  

Additional Information
 Earth MOID = 1.2267 au 
 Jupiter MOID = 2.49069 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 15.23   n/a E2021B10  
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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