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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .032612365605481 9.5925e-08  
a 5.124199243679645 1.4516e-07 au
q 4.957086984509435 4.7042e-07 au
i 31.41438161292159 1.1023e-05 deg
node 95.93077226071117 1.5057e-05 deg
peri 295.2139396869997 0.00016765 deg
M 100.6263731709779 0.0001647 deg
tp 2456416.240825137087
(2013-May-03.74082514)
0.0019386 JED
period 4236.794883049697
11.60
0.00018003
4.929e-07
d
yr
n .08496989114112306 3.6106e-09 deg/d
Q 5.291311502849855 1.4989e-07 au
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      24029 days (65.79 yr)  
   first obs. used      1950-06-13  
   last obs. used      2016-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46344  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:31:12  

Additional Information
 Earth MOID = 4.03639 au 
 Jupiter MOID = .041668 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 10.9 mag n/a MPO365818  
rotation period rot_per 17.672 h n/a LCDB (Rev. 2016-February); 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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