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257544 (1998 QU4)
Classification: Main-belt Asteroid          SPK-ID: 2257544
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 .1138173724793406 1.5479e-07  
a 3.007777393691587 9.1287e-08 AU
q 2.665440073738851 4.9168e-07 AU
i 7.468951125365229 1.2315e-05 deg
node 292.6074915578424 0.00012652 deg
peri 78.07120448505178 0.00013845 deg
M 337.4797415687511 6.6126e-05 deg
tp 2456919.689454566676
(2014-Sep-19.18945457)
0.00035242 JED
period 1905.315774905329
5.22
8.674e-05
2.375e-07
d
yr
n .1889450582110924 8.6018e-09 deg/d
Q 3.350114713644322 1.0168e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      127  
   data-arc span      5791 days (15.85 yr)  
   first obs. used      1998-08-22  
   last obs. used      2014-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60311  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 16:57:15  

Additional Information
 Earth MOID = 1.67618 AU 
 T_jup = 3.228 
[ 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 15.0 mag n/a MPO266702  

257544 (1998 QU4)          Discovered 1998-Aug-22 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20110119/Numbers.arcLast Updated: 2011-01-25

Alternate Designations
 1998 QU4 = 2004 XT133 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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