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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1848490401950003 5.8128e-08  
a 2.270937694052519 1.807e-08 AU
q 1.851157040964263 1.3502e-07 AU
i 6.702654679424404 8.0537e-06 deg
node 47.51911335852683 5.2725e-05 deg
peri 283.6095184631755 5.7435e-05 deg
M 34.20984048563827 2.6349e-05 deg
tp 2456881.716859403286
(2014-Aug-12.21685940)
9.0979e-05 JED
period 1249.989184625667
3.42
1.4919e-05
4.085e-08
d
yr
n .2880024918838069 3.4375e-09 deg/d
Q 2.690718347140774 2.141e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      699  
   data-arc span      8770 days (24.01 yr)  
   first obs. used      1990-07-29  
   last obs. used      2014-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55691  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:49:37  

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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