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48439 (1989 WR2)
Classification: Main-belt Asteroid          SPK-ID: 2048439
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2408754361126227 5.3765e-08  
a 2.685503113893214 2.2654e-08 au
q 2.03863138015238 1.4839e-07 au
i 13.28288723024805 8.4656e-06 deg
node 54.66804997994372 2.6562e-05 deg
peri 34.29067754207741 3.2606e-05 deg
M 315.5005626762915 1.8738e-05 deg
tp 2457599.195913883658
(2016-Jul-29.69591388)
8.4847e-05 JED
period 1607.447943167741
4.40
2.034e-05
5.569e-08
d
yr
n .2239574858583356 2.8339e-09 deg/d
Q 3.332374847634048 2.8111e-08 au
  Orbit Determination Parameters
   # obs. used (total)      822  
   data-arc span      10414 days (28.51 yr)  
   first obs. used      1987-05-30  
   last obs. used      2015-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47992  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 15:00:34  

Additional Information
 Earth MOID = 1.06744 au 
 Jupiter MOID = 2.01043 au 
 T_jup = 3.295 
[ 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 13.5 mag n/a MPO267868  

48439 (1989 WR2)          Discovered 1989-Nov-20 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WR2 = 1987 KR3 = 1998 XW38 = 2000 HL57 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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