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249251 (2008 RO120)
Classification: Main-belt Asteroid          SPK-ID: 2249251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1083470476247266 9.9382e-08  
a 2.693233297425695 2.2944e-08 au
q 2.401429421085014 2.682e-07 au
i 2.166804399573364 5.7087e-06 deg
node 307.6548426307579 0.00031069 deg
peri 50.6501946683762 0.00031329 deg
M 244.6440079028304 4.2347e-05 deg
tp 2459517.805442355590
(2021-Oct-30.30544236)
0.00019218 TDB
period 1614.393460299335
4.42
2.063e-05
5.648e-08
d
yr
n .2229939657543274 2.8495e-09 deg/d
Q 2.985037173766376 2.543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      151  
   data-arc span      7527 days (20.61 yr)  
   first obs. used      1999-09-15  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59667  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 13:42:18  

Additional Information
 Earth MOID = 1.39812 au 
 Jupiter MOID = 2.44248 au 
 T_jup = 3.361 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.7   n/a MPO470659  
diameter diameter 3.297 km 0.710 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249251 (2008 RO120)          Discovered 2008-Sep-09 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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