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219129 (1998 UK31)
Classification: Main-belt Asteroid          SPK-ID: 2219129
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2324688308581919 1.1841e-07  
a 2.384733026786522 3.555e-08 AU
q 1.830356928140542 2.8091e-07 AU
i 2.559414793146307 1.0614e-05 deg
node 219.202428902637 0.000232 deg
peri 157.965292375551 0.00023318 deg
M 87.38445840086574 2.3217e-05 deg
tp 2456473.995046417514
(2013-Jun-30.49504642)
8.4353e-05 JED
period 1345.110851983381
3.68
3.0078e-05
8.235e-08
d
yr
n .2676359345916927 5.9846e-09 deg/d
Q 2.939109125432501 4.3815e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      148  
   data-arc span      5585 days (15.29 yr)  
   first obs. used      1998-10-11  
   last obs. used      2014-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57898  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 21:04:53  

Additional Information
 Earth MOID = .831037 AU 
 T_jup = 3.498 
[ 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 16.9 mag n/a MPO234183  

219129 (1998 UK31)          Discovered 1998-Oct-20 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20091004/Numbers.arcLast Updated: 2009-10-06

Alternate Designations
 1998 UK31 = 2009 QZ5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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