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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1131028149428793 1.0268e-07  
a 3.008817652994636 5.7564e-08 au
q 2.668511906791115 2.9977e-07 au
i 7.464914671378539 8.6772e-06 deg
node 292.59349509969 7.2175e-05 deg
peri 78.4230346882061 8.1914e-05 deg
M 128.3584171552959 3.8293e-05 deg
tp 2456920.804989640243
(2014-Sep-20.30498964)
0.00020111 JED
period 1906.304309077538
5.22
5.4707e-05
1.498e-07
d
yr
n .1888470787616297 5.4195e-09 deg/d
Q 3.349123399198157 6.4075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      294  
   data-arc span      6433 days (17.61 yr)  
   first obs. used      1998-08-22  
   last obs. used      2016-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51364  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 18:40:04  

Additional Information
 Earth MOID = 1.67959 au 
 Jupiter MOID = 2.16339 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 15.1 mag n/a MPO367749  

257544 (1998 QU4)          Discovered 1998-Aug-22 by Beijing Schmidt CCD Asteroid Program at Xinglong
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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