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4749 (1989 WE1)
Classification: Main-belt Asteroid          SPK-ID: 2004749
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .104346845293059 7.2518e-08  
a 3.009152195998305 3.311e-08 AU
q 2.695156657339201 2.3274e-07 AU
i 10.75407201790169 7.042e-06 deg
node 93.09343511794142 3.8401e-05 deg
peri 284.9628207364666 5.4018e-05 deg
M 328.3338464180106 4.0265e-05 deg
tp 2457168.209425311681
(2015-May-25.70942531)
0.00021408 JED
period 1906.622253816915
5.22
3.1468e-05
8.615e-08
d
yr
n .1888155869781269 3.1164e-09 deg/d
Q 3.323147734657409 3.6565e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      942  
   data-arc span      14011 days (38.36 yr)  
   first obs. used      1976-04-23  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47897  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:46:32  

Additional Information
 Earth MOID = 1.72315 AU 
 T_jup = 3.215 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7 mag n/a MPO267727  

4749 (1989 WE1)          Discovered 1989-Nov-22 by Kawasato, N. at Uenohara
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 WE1 = 1976 HJ = 1978 TG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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