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48438 (1989 WJ2)
Classification: Jupiter Trojan          SPK-ID: 2048438
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03065453397905663 7.3418e-08  
a 5.131034090975622 1.1927e-07 au
q 4.973744632086112 3.7689e-07 au
i 31.41037767581043 5.8104e-06 deg
node 95.88776680716057 1.1607e-05 deg
peri 293.9901378528012 0.0001204 deg
M 186.9806942401969 0.00012513 deg
tp 2460640.817907965398
(2024-Nov-26.31790797)
0.0015147 TDB
period 4245.274500680548
11.62
0.00014802
4.053e-07
d
yr
n .08480017015208072 2.9568e-09 deg/d
Q 5.288323549865133 1.2293e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      25170 days (68.91 yr)  
   first obs. used      1950-06-13  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47073  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:38:25  

Additional Information
 Earth MOID = 4.05434 au 
 Jupiter MOID = .0366439 au 
 T_jup = 2.708 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.9   n/a MPO365818  
diameter diameter 36.052 km 0.418 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 17.672 h n/a LCDB (Rev. 2019-January); 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 Bull. 35, 82-84.]
geometric albedo albedo 0.086   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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