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JPL Small-Body Database Browser
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20171 (1996 WC2)
Classification: Main-belt Asteroid          SPK-ID: 2020171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03181085273859323 4.9033e-08  
a 2.383925109744559 1.0261e-08 au
q 2.30809041913864 1.2046e-07 au
i 8.035336545187461 4.3443e-06 deg
node 69.70985734420447 3.1118e-05 deg
peri 122.5030202679494 7.0916e-05 deg
M 260.4643413381075 6.4333e-05 deg
tp 2458972.217949558368
(2020-May-02.71794956)
0.00024071 TDB
period 1344.427350358663
3.68
8.6799e-06
2.376e-08
d
yr
n .2677719996576685 1.7288e-09 deg/d
Q 2.459759800350477 1.0587e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      10423 days (28.54 yr)  
   first obs. used      1991-05-12  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55218  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:05:36  

Additional Information
 Earth MOID = 1.31302 au 
 Jupiter MOID = 2.51592 au 
 T_jup = 3.522 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO452455  
diameter diameter 2.346 km 0.602 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.508   0.286 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20171 (1996 WC2)          Discovered 1996-Nov-30 by Lai, L. at Madonna di Dossob
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 WC2 = 1991 JC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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