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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1858969882532348 8.34e-08  
a 2.194657593685486 1.6971e-08 au
q 1.786677356772263 1.8958e-07 au
i 4.862206898294333 8.3292e-06 deg
node 11.48124921601416 8.2828e-05 deg
peri 353.0990652699496 8.6794e-05 deg
M 121.1831974233874 2.1257e-05 deg
tp 2457000.749982542577
(2014-Dec-09.24998254)
6.9309e-05 JED
period 1187.540924356719
3.25
1.3775e-05
3.771e-08
d
yr
n .3031474474827123 3.5164e-09 deg/d
Q 2.60263783059871 2.0126e-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 = .783018 au 
 Jupiter MOID = 2.84578 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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