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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3786764166311132 5.6664e-08  
a 2.737844833175215 1.3742e-08 au
q 1.701087562456417 1.5404e-07 au
i 16.8762640188997 5.7087e-06 deg
node 358.4005147769687 1.8134e-05 deg
peri 332.1493766413404 1.871e-05 deg
M 172.8350069108745 9.7272e-06 deg
tp 2458406.096984848497
(2018-Oct-14.59698485)
4.141e-05 TDB
period 1654.671067893175
4.53
1.2457e-05
3.411e-08
d
yr
n .2175658999455241 1.638e-09 deg/d
Q 3.774602103894013 1.8945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      996  
   data-arc span      17356 days (47.52 yr)  
   first obs. used      1973-09-02  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:22:40  

Additional Information
 Earth MOID = .707148 au 
 Jupiter MOID = 1.69672 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 14.37   n/a E2021B10  
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

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