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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03328729385012769 1.2192e-07  
a 5.12015541208712 1.8764e-07 AU
q 4.949719294326655 6.8554e-07 AU
i 31.4299090205541 1.2564e-05 deg
node 95.9382929281706 2.2124e-05 deg
peri 293.5456087846826 0.00017873 deg
M 51.173940448649 0.00017255 deg
tp 2456398.953089707441
(2013-Apr-16.45308971)
0.002035 JED
period 4231.780586109592
11.59
0.00023262
6.369e-07
d
yr
n .08507057317235799 4.6763e-09 deg/d
Q 5.290591529847585 1.9388e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      643  
   data-arc span      23660 days (64.78 yr)  
   first obs. used      1950-06-13  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45547  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:43:02  

Additional Information
 Earth MOID = 4.03437 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 10.7 mag n/a MPO337644  
rotation period rot_per 17.672 h n/a LCDB (Rev. 2015-July); 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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