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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1860877596729782 8.9242e-08  
a 2.194137452708295 1.7392e-08 AU
q 1.785835329719233 2.016e-07 AU
i 4.862002059359316 9.2032e-06 deg
node 11.48725664139936 8.5804e-05 deg
peri 352.9893386776967 8.9557e-05 deg
M 359.9801529364032 2.1148e-05 deg
tp 2457000.565446727168
(2014-Dec-09.06544673)
6.9737e-05 JED
period 1187.118772788321
3.25
1.4115e-05
3.864e-08
d
yr
n .3032552498133165 3.6057e-09 deg/d
Q 2.602439575697357 2.0629e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      5795 days (15.87 yr)  
   first obs. used      1998-09-18  
   last obs. used      2014-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53732  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 17:55:48  

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 (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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