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18401 (1992 WE4)
Classification: Main-belt Asteroid          SPK-ID: 2018401
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1872213643441871 5.5123e-08  
a 2.530459417375004 1.1435e-08 au
q 2.056703352836459 1.4112e-07 au
i 16.49438106245332 5.9238e-06 deg
node 68.13228628465041 1.4627e-05 deg
peri 304.7652636468982 1.8964e-05 deg
M 237.9704332356332 1.2301e-05 deg
tp 2459098.879374262583
(2020-Sep-06.37937426)
5.1382e-05 TDB
period 1470.271340723307
4.03
9.966e-06
2.729e-08
d
yr
n .2448527629076252 1.6597e-09 deg/d
Q 3.004215481913549 1.3576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      9671 days (26.48 yr)  
   first obs. used      1992-11-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50498  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:36:05  

Additional Information
 Earth MOID = 1.10383 au 
 Jupiter MOID = 2.53779 au 
 T_jup = 3.370 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO337414  
diameter diameter 4.497 km 0.487 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.241   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18401 (1992 WE4)          Discovered 1992-Nov-21 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1992 WE4 = 1999 JT127 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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