Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02915807332799265 4.505e-08  
a 2.735037485718345 2.0296e-08 au
q 2.655289062154961 1.3024e-07 au
i 2.263510989667016 6.887e-06 deg
node 212.7002171172237 0.00011921 deg
peri 240.29726353077 0.00017957 deg
M 297.7993350940124 0.00013222 deg
tp 2457685.953832260480
(2016-Oct-24.45383226)
0.00060712 JED
period 1652.126705865496
4.52
1.839e-05
5.035e-08
d
yr
n .217900962875246 2.4254e-09 deg/d
Q 2.814785909281729 2.0888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      9006 days (24.66 yr)  
   first obs. used      1991-04-20  
   last obs. used      2015-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55513  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:18:24  

Additional Information
 Earth MOID = 1.67236 au 
 Jupiter MOID = 2.23201 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 14.6 mag n/a MPO358926  
rotation period rot_per 8.90 h n/a LCDB (Rev. 2015-December); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-12 22:30 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin