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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1860877472607979 8.3363e-08  
a 2.19413745301607 1.7209e-08 AU
q 1.785835357203765 1.8974e-07 AU
i 4.862005799179179 8.3287e-06 deg
node 11.48727704008762 8.2848e-05 deg
peri 352.9893191497902 8.68e-05 deg
M 359.9801523071349 2.0976e-05 deg
tp 2457000.565448802227
(2014-Dec-09.06544880)
6.9171e-05 JED
period 1187.118773038099
3.25
1.3966e-05
3.824e-08
d
yr
n .3032552497495095 3.5677e-09 deg/d
Q 2.602439548828375 2.0411e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      139  
   data-arc span      5968 days (16.34 yr)  
   first obs. used      1998-09-18  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52593  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 22:03:11  

Additional Information
 Earth MOID = .784082 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
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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