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18477 (1995 WA11)
Classification: Main-belt Asteroid          SPK-ID: 2018477
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .216857359095131 4.1352e-08  
a 3.1645611718296 2.3419e-08 au
q 2.47830279341164 1.3748e-07 au
i 10.455618824714 5.1721e-06 deg
node 54.75925132185034 2.7127e-05 deg
peri 258.9777191428808 2.9603e-05 deg
M 200.3952975949641 1.2761e-05 deg
tp 2459912.115816424597
(2022-Nov-28.61581642)
7.5238e-05 TDB
period 2056.215693946246
5.63
2.2825e-05
6.249e-08
d
yr
n .1750789088225932 1.9435e-09 deg/d
Q 3.85081955024756 2.8498e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1012  
   data-arc span      8844 days (24.21 yr)  
   first obs. used      1995-11-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56594  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:26:44  

Additional Information
 Earth MOID = 1.49117 au 
 Jupiter MOID = 1.59824 au 
 T_jup = 3.142 
[ 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 14.2   n/a MPO381412  
diameter diameter 10.900 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.045   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18477 (1995 WA11)          Discovered 1995-Nov-16 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1995 WA11 = 1999 JK45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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