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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2411263788707055 7.3037e-08  
a 2.685763034240523 2.5944e-08 AU
q 2.038154719289307 1.9285e-07 AU
i 13.28387677308645 1.1077e-05 deg
node 54.68878049695544 2.6819e-05 deg
peri 34.22235492473163 3.5875e-05 deg
M 181.2288754103915 2.0067e-05 deg
tp 2457598.852769810523
(2016-Jul-29.35276981)
9.1333e-05 JED
period 1607.681317615285
4.40
2.3295e-05
6.378e-08
d
yr
n .2239249757122246 3.2447e-09 deg/d
Q 3.333371349191738 3.22e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      691  
   data-arc span      9555 days (26.16 yr)  
   first obs. used      1987-05-30  
   last obs. used      2013-07-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4933  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 07:18:56  

Additional Information
 Earth MOID = 1.06673 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 (399)
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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