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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136344597805112 1.5364e-07  
a 3.007149870498582 6.7076e-08 AU
q 2.665434019485442 4.7895e-07 AU
i 7.468916003317235 9.0713e-06 deg
node 292.6057299104069 0.0001253 deg
peri 78.08170611459737 0.0001318 deg
M 15.26634757704209 4.2044e-05 deg
tp 2456919.727470869426
(2014-Sep-19.22747087)
0.00022283 JED
period 1904.719536894012
5.21
6.3729e-05
1.745e-07
d
yr
n .1890042040452028 6.3238e-09 deg/d
Q 3.348865721511723 7.4699e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      176  
   data-arc span      5968 days (16.34 yr)  
   first obs. used      1998-08-22  
   last obs. used      2014-12-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57874  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 21:05:35  

Additional Information
 Earth MOID = 1.67758 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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