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48438 (1989 WJ2)
Classification: Jupiter Trojan          SPK-ID: 2048438
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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03324662418444051 1.4694e-07  
a 5.118248096839984 2.0119e-07 AU
q 4.948083625881618 8.478e-07 AU
i 31.43326417839911 1.2794e-05 deg
node 95.93586198443106 2.6307e-05 deg
peri 292.7096053955174 0.0001821 deg
M 34.95725604319448 0.00017635 deg
tp 2456389.808927807738
(2013-Apr-07.30892781)
0.0020742 JED
period 4229.416227821973
11.58
0.00024938
6.828e-07
d
yr
n .0851181299281555 5.0189e-09 deg/d
Q 5.288412567798351 2.0788e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      505  
   data-arc span      23216 days (63.56 yr)  
   first obs. used      1950-06-13  
   last obs. used      2014-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53416  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jan-22 12:14:13  

Additional Information
 Earth MOID = 4.03387 AU 
 T_jup = 2.708 
[ 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 10.6 mag n/a MPO247729  
rotation period rot_per 17.672 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bul. 35, 82-84.]

48438 (1989 WJ2)          Discovered 1989-Nov-21 by McNaught, R. H. at Siding Spring (413)
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WJ2 = 2001 RU48 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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