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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044681901395524 8.6641e-08  
a 3.009446152991829 3.4834e-08 AU
q 2.695054760066334 2.6345e-07 AU
i 10.75450632811241 7.9532e-06 deg
node 93.09582804011987 4.3484e-05 deg
peri 284.9517564695843 6.1742e-05 deg
M 290.59252658002 4.9708e-05 deg
tp 2457168.147847078453
(2015-May-25.64784708)
0.00026669 JED
period 1906.90164079857
5.22
3.3108e-05
9.064e-08
d
yr
n .1887879229309592 3.2778e-09 deg/d
Q 3.323837545917323 3.8473e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      905  
   data-arc span      13633 days (37.33 yr)  
   first obs. used      1976-04-23  
   last obs. used      2013-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53992  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Sep-23 22:14:42  

Additional Information
 Earth MOID = 1.72186 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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