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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .184054741435401 5.449e-08  
a 2.272213659228149 1.1991e-08 au
q 1.854001961692926 1.2447e-07 au
i 6.703115252041313 4.7812e-06 deg
node 47.47897380127688 4.7907e-05 deg
peri 283.7641092858047 4.9438e-05 deg
M 206.8500166187687 1.1771e-05 deg
tp 2458132.714410414090
(2018-Jan-14.21441041)
4.1381e-05 JED
period 1251.042824289022
3.43
9.9027e-06
2.711e-08
d
yr
n .2877599335614998 2.2778e-09 deg/d
Q 2.690425356763372 1.4197e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1025  
   data-arc span      9361 days (25.63 yr)  
   first obs. used      1990-07-29  
   last obs. used      2016-03-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57654  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 17:05:00  

Additional Information
 Earth MOID = .857032 au 
 Jupiter MOID = 2.67699 au 
 T_jup = 3.580 
[ 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
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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