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229945 (1998 US8)
Classification: Main-belt Asteroid          SPK-ID: 2229945
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1834588223274969 2.116e-07  
a 2.314586672057673 1.8225e-08 au
q 1.889955327027052 4.9627e-07 au
i 2.128025369615396 1.5907e-05 deg
node 337.9459397049606 0.00031132 deg
peri 43.01515160702646 0.00031442 deg
M 326.9501323774511 3.2495e-05 deg
tp 2457518.579858064800
(2016-May-10.07985806)
0.00011685 JED
period 1286.20027737496
3.52
1.5191e-05
4.159e-08
d
yr
n .2798942018071506 3.3059e-09 deg/d
Q 2.739218017088294 2.1569e-08 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      8157 days (22.33 yr)  
   first obs. used      1991-11-09  
   last obs. used      2014-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56822  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 23:53:33  

Additional Information
 Earth MOID = .891583 au 
 Jupiter MOID = 2.72179 au 
 T_jup = 3.558 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.5 mag n/a MPO287942  

229945 (1998 US8)          Discovered 1998-Oct-17 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20100130/Numbers.arcLast Updated: 2010-02-01

Alternate Designations
 1998 US8 = 2005 SQ88 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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