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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848490377819193 5.8073e-08  
a 2.270937694859738 1.54e-08 AU
q 1.851157047102226 1.3486e-07 AU
i 6.70265034670676 7.154e-06 deg
node 47.51910782867034 5.2525e-05 deg
peri 283.6095241869261 5.5919e-05 deg
M 34.20983977091079 1.8884e-05 deg
tp 2456881.716861821624
(2014-Aug-12.21686182)
6.5576e-05 JED
period 1249.989185292142
3.42
1.2715e-05
3.481e-08
d
yr
n .2880024917302484 2.9296e-09 deg/d
Q 2.690718342617251 1.8247e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      716  
   data-arc span      8804 days (24.10 yr)  
   first obs. used      1990-07-29  
   last obs. used      2014-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56031  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:27:26  

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 14.8 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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