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2128 Wetherill (1973 SB)
Classification: Main-belt Asteroid          SPK-ID: 2002128
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3785723605121015 5.7594e-08  
a 2.737920938678381 1.3808e-08 au
q 1.701419746027397 1.5652e-07 au
i 16.87369920841796 5.756e-06 deg
node 358.4088384137554 1.9114e-05 deg
peri 332.1273388841262 1.9728e-05 deg
M 129.3564600438706 9.6405e-06 deg
tp 2458405.913009062688
(2018-Oct-14.41300906)
4.1953e-05 TDB
period 1654.740062188141
4.53
1.2518e-05
3.427e-08
d
yr
n .2175568285474124 1.6458e-09 deg/d
Q 3.774422131329364 1.9036e-08 au
  Orbit Determination Parameters
   # obs. used (total)      907  
   data-arc span      16955 days (46.42 yr)  
   first obs. used      1973-09-02  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5174  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:13:16  

Additional Information
 Earth MOID = .709294 au 
 Jupiter MOID = 1.69636 au 
 T_jup = 3.185 
[ 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 14.4   n/a MPO492775  
diameter diameter 8.949 km 1.581 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.047   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

2128 Wetherill (1973 SB)          Discovered 1973-Sep-26 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1973 SB = 1973 TS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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