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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136344596777124 1.5365e-07  
a 3.007149870559128 6.711e-08 AU
q 2.665434019848239 4.7901e-07 AU
i 7.468915813415988 9.0874e-06 deg
node 292.6057290853635 0.00012533 deg
peri 78.08170697857764 0.00013184 deg
M 15.26634751676467 4.2076e-05 deg
tp 2456919.727471185908
(2014-Sep-19.22747119)
0.000223 JED
period 1904.719536951536
5.21
6.3761e-05
1.746e-07
d
yr
n .1890042040394947 6.327e-09 deg/d
Q 3.348865721270017 7.4736e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      168  
   data-arc span      5933 days (16.24 yr)  
   first obs. used      1998-08-22  
   last obs. used      2014-11-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5916  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 10:41:10  

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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