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129449 (1990 WE1)
Classification: Main-belt Asteroid          SPK-ID: 2129449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2563217055700727 5.223e-08  
a 2.76335844637883 1.6941e-08 au
q 2.055049696301542 1.4177e-07 au
i 11.71912833160083 5.3974e-06 deg
node 82.37240453338103 2.5513e-05 deg
peri 12.53476012234102 2.913e-05 deg
M 128.6848566788 1.1493e-05 deg
tp 2458400.737644774594
(2018-Oct-09.23764477)
5.1835e-05 TDB
period 1677.854360284776
4.59
1.5429e-05
4.224e-08
d
yr
n .2145597428008582 1.9731e-09 deg/d
Q 3.471667196456118 2.1283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      561  
   data-arc span      10761 days (29.46 yr)  
   first obs. used      1990-11-11  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51459  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:44:23  

Additional Information
 Earth MOID = 1.0733 au 
 Jupiter MOID = 1.75927 au 
 T_jup = 3.262 
[ 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 15.4   n/a MPO280654  
diameter diameter 3.984 km 0.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.093   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129449 (1990 WE1)          Discovered 1990-Nov-18 by Elst, E. W. at La Silla
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1990 WE1 = 2004 XO83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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