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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1849449613646792 6.4004e-08  
a 2.271216779473074 2.0709e-08 AU
q 1.851166679942616 1.47e-07 AU
i 6.702521813479836 8.6865e-06 deg
node 47.52277281104644 5.7789e-05 deg
peri 283.6185752058475 6.4374e-05 deg
M 336.6048682178063 3.556e-05 deg
tp 2456881.747368576722
(2014-Aug-12.24736858)
0.00012415 JED
period 1250.219616624758
3.42
1.7099e-05
4.681e-08
d
yr
n .2879494092181172 3.9383e-09 deg/d
Q 2.691266879003533 2.4539e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      692  
   data-arc span      8361 days (22.89 yr)  
   first obs. used      1990-07-29  
   last obs. used      2013-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56153  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 22:47:05  

Additional Information
 Earth MOID = .853754 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 14.8 mag n/a MPO263605  

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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