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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03292405643907693 1.0872e-07  
a 5.123261151262811 1.6336e-07 au
q 4.954582611966504 5.7666e-07 au
i 31.41889447966713 1.214e-05 deg
node 95.93602963728281 1.9299e-05 deg
peri 294.9117786392331 0.00017399 deg
M 83.89351856359858 0.00016887 deg
tp 2456413.438809467866
(2013-Apr-30.93880947)
0.0019929 JED
period 4235.631484715809
11.60
0.00020259
5.547e-07
d
yr
n .08499322976964657 4.0651e-09 deg/d
Q 5.291939690559118 1.6874e-07 au
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      23932 days (65.52 yr)  
   first obs. used      1950-06-13  
   last obs. used      2015-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46673  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 15:00:33  

Additional Information
 Earth MOID = 4.03583 au 
 Jupiter MOID = .0443764 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 10.8 mag n/a MPO359065  
rotation period rot_per 17.672 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 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
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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