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31555 Wheeler (1999 EV2)
Classification: Main-belt Asteroid          SPK-ID: 2031555
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04600027996727196 8.7408e-08  
a 2.272424171256858 1.5836e-08 AU
q 2.167892023174647 1.9582e-07 AU
i 6.910348600276296 1.059e-05 deg
node 50.68929644371789 5.0038e-05 deg
peri 123.4192992834418 0.00013095 deg
M 154.073443394198 0.0001183 deg
tp 2456265.002047007066
(2012-Dec-03.50204701)
0.00041011 JED
period 1251.216684917135
3.43
1.3079e-05
3.581e-08
d
yr
n .2877199483827552 3.0075e-09 deg/d
Q 2.376956319339069 1.6564e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      21729 days (59.49 yr)  
   first obs. used      1953-12-07  
   last obs. used      2013-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57815  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 22:57:03  

Additional Information
 Earth MOID = 1.17835 AU 
 T_jup = 3.600 
[ 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 15.0 mag n/a MPO263611  

31555 Wheeler           Discovered 1999 Mar. 7 by S. Sposetti at Gnosca.
John Archibald Wheeler (b. 1911), one of the world's finest theoretical physicists, was a professor at Princeton and later at the Univerity of Texas. From nuclear physics and quantum theory, to relativity and gravitation, Wheeler's work has set the trajectory of research for more than half a century.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060219/MPCPages.arcLast Updated: 2010-06-03

Alternate Designations
 1999 EV2 = 1990 SU21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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