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30811 (1990 OD2)
Classification: Main-belt Asteroid          SPK-ID: 2030811
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1846009983272102 3.6523e-08  
a 2.271501625498591 8.4344e-09 au
q 1.852180157729671 8.5132e-08 au
i 6.704801634392392 3.6983e-06 deg
node 47.43260995055479 3.1206e-05 deg
peri 283.8934896837685 3.2438e-05 deg
M 3.822795836153146 1.032e-05 deg
tp 2459383.221573673446
(2021-Jun-17.72157367)
3.5813e-05 TDB
period 1250.454819572507
3.42
6.9646e-06
1.907e-08
d
yr
n .2878952476852168 1.6035e-09 deg/d
Q 2.690823093267512 9.9913e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1602  
   data-arc span      11333 days (31.03 yr)  
   first obs. used      1990-07-29  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54128  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:44:02  

Additional Information
 Earth MOID = .855199 au 
 Jupiter MOID = 2.68732 au 
 T_jup = 3.581 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457118.5 (2015-Apr-06.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .184791230293537 3.6607e-08  
q 1.851149926454952 8.527e-08 au
tp 2456881.681846495459
(2014-Aug-12.18184650)
3.1774e-05 TDB
node 47.51891281943733 3.1235e-05 deg
peri 283.5975997582817 3.2449e-05 deg
i 6.702823074625442 3.6959e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1602  
   data-arc span      11333 days (31.03 yr)  
   first obs. used      1990-07-29  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54128  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:44:02  

Additional Information
 Jupiter MOID = 2.68732 au 
 T_jup = 3.581 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.340095814551222E-15 -3.112319508833329E-15 2.342699357986226E-13 -3.266076927660691E-15 8.302740181757041E-14 -1.553105936440864E-15
q -3.112319508833329E-15 7.271054185322935E-15 -5.136447861201743E-13 7.668150456450988E-15 -1.841494173356004E-13 3.69018227198408E-15
tp 2.342699357986226E-13 -5.136447861201743E-13 1.00956011858539E-9 2.378833389884445E-12 2.91515880155834E-10 -7.482550193409838E-13
node -3.266076927660691E-15 7.668150456450988E-15 2.378833389884445E-12 9.756412512656663E-10 -9.68087047449419E-10 -3.102185573442285E-11
peri 8.302740181757041E-14 -1.841494173356004E-13 2.91515880155834E-10 -9.68087047449419E-10 1.05296544318491E-9 3.058799269784945E-11
i -1.553105936440864E-15 3.69018227198408E-15 -7.482550193409838E-13 -3.102185573442285E-11 3.058799269784945E-11 1.365983669448647E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.95   n/a MPCxxxxx  
diameter diameter 2.406 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.278   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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