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78503 (2002 RO81)
Classification: Main-belt Asteroid          SPK-ID: 2078503
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1336039255288639 3.637e-08  
a 3.014491192047202 2.0014e-08 au
q 2.611743335317511 1.1138e-07 au
i 3.640050222067124 5.3426e-06 deg
node 169.8560052333362 6.3388e-05 deg
peri 290.794096629924 6.7909e-05 deg
M 49.31484452016586 2.1017e-05 deg
tp 2458738.624648525062
(2019-Sep-12.12464852)
0.0001121 TDB
period 1911.698748080338
5.23
1.9039e-05
5.213e-08
d
yr
n .1883141893363165 1.8754e-09 deg/d
Q 3.417239048776892 2.2688e-08 au
  Orbit Determination Parameters
   # obs. used (total)      812  
   data-arc span      8214 days (22.49 yr)  
   first obs. used      1997-10-30  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54617  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:32:57  

Additional Information
 Earth MOID = 1.6314 au 
 Jupiter MOID = 1.74271 au 
 T_jup = 3.232 
[ 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 14.9   n/a MPO385309  
diameter diameter 4.604 km 0.370 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.110   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

78503 (2002 RO81)          Discovered 2002-Sep-05 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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