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118306 (1998 US39)
Classification: Main-belt Asteroid          SPK-ID: 2118306
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .23565056957376 5.0631e-08  
a 2.320745874754192 6.3088e-09 au
q 1.773860787532412 1.1958e-07 au
i 1.251583562734833 3.0743e-06 deg
node 242.6002524641428 0.00022427 deg
peri 92.70723719152372 0.00022439 deg
M 130.6366374956258 6.4679e-06 deg
tp 2458731.899982772035
(2019-Sep-05.39998277)
2.3001e-05 TDB
period 1291.337632658493
3.54
5.2657e-06
1.442e-08
d
yr
n .2787806928997054 1.1368e-09 deg/d
Q 2.867630961975971 7.7955e-09 au
  Orbit Determination Parameters
   # obs. used (total)      641  
   data-arc span      10711 days (29.33 yr)  
   first obs. used      1991-11-07  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56142  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:38  

Additional Information
 Earth MOID = .762777 au 
 Jupiter MOID = 2.51793 au 
 T_jup = 3.540 
[ 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 16.65   n/a E2021B55  

118306 (1998 US39)          Discovered 1998-Oct-28 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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