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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02931220146160913 5.3014e-08  
a 2.735431686130421 2.7088e-08 AU
q 2.655250161462097 1.4299e-07 AU
i 2.26302711464725 7.242e-06 deg
node 212.7138820207991 0.00014027 deg
peri 239.9030540154316 0.00019915 deg
M 211.0530145289343 0.00013621 deg
tp 2457684.201376142999
(2016-Oct-22.70137614)
0.00062425 JED
period 1652.48389977851
4.52
2.4546e-05
6.72e-08
d
yr
n .2178538623270414 3.2359e-09 deg/d
Q 2.815613210798745 2.7882e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      721  
   data-arc span      8836 days (24.19 yr)  
   first obs. used      1991-04-20  
   last obs. used      2015-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5713  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:49:10  

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 LCDB (Rev. 2015-July); Warner et al., 2009 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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