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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2168573582634688 4.1655e-08  
a 3.164561172659167 2.4255e-08 au
q 2.478302796693155 1.3905e-07 au
i 10.45561775198205 5.5492e-06 deg
node 54.75925393275218 2.7567e-05 deg
peri 258.9777155093994 3.0391e-05 deg
M 200.3952982858547 1.317e-05 deg
tp 2459912.115812836891
(2022-Nov-28.61581284)
7.6902e-05 TDB
period 2056.21569475478
5.63
2.364e-05
6.472e-08
d
yr
n .1750789087537497 2.0129e-09 deg/d
Q 3.850819548625179 2.9515e-08 au
  Orbit Determination Parameters
   # obs. used (total)      978  
   data-arc span      8817 days (24.14 yr)  
   first obs. used      1995-11-14  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56994  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:47:22  

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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