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49345 (1998 WH4)
Classification: Main-belt Asteroid          SPK-ID: 2049345
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0624156402716554 5.2906e-08  
a 2.685285158147598 2.3744e-08 AU
q 2.517681365689842 1.398e-07 AU
i 4.311088804943809 5.7439e-06 deg
node 72.48449807200068 8.3005e-05 deg
peri 358.7055357063348 9.872e-05 deg
M 224.9649294181885 5.6793e-05 deg
tp 2457603.376171809151
(2016-Aug-02.87617181)
0.00025683 JED
period 1607.25225614484
4.40
2.1318e-05
5.837e-08
d
yr
n .2239847532480665 2.9708e-09 deg/d
Q 2.852888950605353 2.5226e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      938  
   data-arc span      6677 days (18.28 yr)  
   first obs. used      1996-05-11  
   last obs. used      2014-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54733  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:51:23  

Additional Information
 Earth MOID = 1.53173 AU 
 T_jup = 3.368 
[ 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 MPO299295  

49345 (1998 WH4)          Discovered 1998-Nov-18 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 WH4 = 1996 LM4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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