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31956 Wald (2000 GA133)
Classification: Main-belt Asteroid          SPK-ID: 2031956
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02931220293059873 5.3211e-08  
a 2.735431687139191 2.724e-08 AU
q 2.655250158422977 1.4332e-07 AU
i 2.263026208892696 7.2571e-06 deg
node 212.7138711302663 0.00014038 deg
peri 239.90306242025 0.00019943 deg
M 211.0530166525179 0.00013642 deg
tp 2457684.201366773458
(2016-Oct-22.70136677)
0.00062517 JED
period 1652.483900692612
4.52
2.4684e-05
6.758e-08
d
yr
n .2178538622065315 3.2542e-09 deg/d
Q 2.815613215855405 2.8039e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      717  
   data-arc span      8060 days (22.07 yr)  
   first obs. used      1991-04-20  
   last obs. used      2013-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56944  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 02:59:30  

Additional Information
 Earth MOID = 1.67245 AU 
 T_jup = 3.351 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO263614  
rotation period rot_per 8.90 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Polishook, D. (2011) Minor Planet Bul. 38, 18-21.]

31956 Wald           Discovered 2000 Apr. 13 by P. G. Comba at Prescott.
Abraham Wald (1902-1950) was an American statistician whose most important work was the development of the theory of sequential testing of hypotheses.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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