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297309 (1998 UJ18)
Classification: Main-belt Asteroid          SPK-ID: 2297309
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1861673216047995 1.1138e-07  
a 2.194319392791249 1.7947e-08 AU
q 1.785808828689832 2.4696e-07 AU
i 4.861820158047568 1.2439e-05 deg
node 11.49061162599292 8.6879e-05 deg
peri 352.9862357087334 9.0592e-05 deg
M 299.3378589765109 2.1237e-05 deg
tp 2457000.561454717799
(2014-Dec-09.06145472)
7.0446e-05 JED
period 1187.266431471975
3.25
1.4565e-05
3.988e-08
d
yr
n .3032175343774114 3.7199e-09 deg/d
Q 2.602829956892666 2.1288e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      112  
   data-arc span      5769 days (15.79 yr)  
   first obs. used      1998-09-18  
   last obs. used      2014-07-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55748  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 17:14:15  

Additional Information
 Earth MOID = .782589 AU 
 T_jup = 3.643 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.2 mag n/a MPO260569  

297309 (1998 UJ18)          Discovered 1998-Oct-20 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20111012/Numbers.arcLast Updated: 2011-10-13

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