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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1846010007713117 3.6941e-08  
a 2.271501624926571 8.7475e-09 au
q 1.852180151711465 8.6354e-08 au
i 6.70480157586822 3.7239e-06 deg
node 47.43260978193108 3.1233e-05 deg
peri 283.8934899562049 3.2475e-05 deg
M 3.822796130911549 1.0599e-05 deg
tp 2459383.221572654623
(2021-Jun-17.72157265)
3.6778e-05 TDB
period 1250.454819100164
3.42
7.2232e-06
1.978e-08
d
yr
n .2878952477939655 1.663e-09 deg/d
Q 2.690823098141677 1.0362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1546  
   data-arc span      11287 days (30.90 yr)  
   first obs. used      1990-07-29  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54799  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 06:45:59  

Additional Information
 Earth MOID = .855199 au 
 Jupiter MOID = 2.68732 au 
 T_jup = 3.581 
[ show covariance matrix ]

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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