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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2410417873708105 7.2998e-08  
a 2.685870085319741 2.5991e-08 AU
q 2.038463159308479 1.9272e-07 AU
i 13.28255097443927 1.1076e-05 deg
node 54.68196491478212 2.6823e-05 deg
peri 34.24524578710778 3.5886e-05 deg
M 225.9833583328048 2.0145e-05 deg
tp 2457599.024813583792
(2016-Jul-29.52481358)
9.1374e-05 JED
period 1607.777438754518
4.40
2.3338e-05
6.39e-08
d
yr
n .2239115883345632 3.2502e-09 deg/d
Q 3.333277011331002 3.2256e-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 = 1.06746 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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