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308516 (2005 UN39)
Classification: Outer Main-belt Asteroid          SPK-ID: 2308516
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06700286689985323 1.0397e-07  
a 3.254810921694062 5.7787e-08 au
q 3.036729258723606 3.6067e-07 au
i 3.884611493289434 1.0146e-05 deg
node 221.5703782820334 0.00011314 deg
peri 152.1467673450031 0.00012991 deg
M 210.7627098528742 6.9873e-05 deg
tp 2459889.623169418202
(2022-Nov-06.12316942)
0.00043116 TDB
period 2144.801347404506
5.87
5.712e-05
1.564e-07
d
yr
n .1678477125332132 4.4701e-09 deg/d
Q 3.472892584664518 6.1659e-08 au
  Orbit Determination Parameters
   # obs. used (total)      107  
   data-arc span      7491 days (20.51 yr)  
   first obs. used      1999-10-16  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58686  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:13:17  

Additional Information
 Earth MOID = 2.03805 au 
 Jupiter MOID = 1.92481 au 
 T_jup = 3.173 
[ 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 16.5   n/a MPO471235  

308516 (2005 UN39)          Discovered 2005-Oct-24 by Spacewatch at Kitt Peak
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 2005 UN39 = 1999 XJ145 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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