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30811 (1990 OD2)
Classification: Main-belt Asteroid          SPK-ID: 2030811
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .184849037494652 5.8043e-08  
a 2.270937690235968 1.4523e-08 AU
q 1.851157043985521 1.3469e-07 AU
i 6.702643892179856 6.4974e-06 deg
node 47.5190840658339 5.1659e-05 deg
peri 283.6095412268089 5.4779e-05 deg
M 34.20984902736461 1.6214e-05 deg
tp 2456881.716830044212
(2014-Aug-12.21683004)
5.6544e-05 JED
period 1249.989181474559
3.42
1.199e-05
3.283e-08
d
yr
n .2880024926098347 2.7626e-09 deg/d
Q 2.690718336486415 1.7207e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      763  
   data-arc span      8859 days (24.25 yr)  
   first obs. used      1990-07-29  
   last obs. used      2014-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56148  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:57:45  

Additional Information
 Earth MOID = .855493 AU 
 T_jup = 3.581 
[ 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 14.9 mag n/a MPO309392  

30811 (1990 OD2)          Discovered 1990-Jul-29 by Holt, H. E. at Palomar (675)
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 OD2 = 1997 WD1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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