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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2164838804468566 4.1996e-08  
a 3.165411472426396 2.508e-08 au
q 2.480150913664532 1.4082e-07 au
i 10.45651562662369 5.9238e-06 deg
node 54.77335930086078 2.8179e-05 deg
peri 258.9241352016492 3.1366e-05 deg
M 130.4478669410568 1.3665e-05 deg
tp 2457855.119261037943
(2017-Apr-11.61926104)
7.8949e-05 TDB
period 2057.044490789485
5.63
2.4448e-05
6.693e-08
d
yr
n .1750083683711836 2.08e-09 deg/d
Q 3.85067203118826 3.051e-08 au
  Orbit Determination Parameters
   # obs. used (total)      966  
   data-arc span      8720 days (23.87 yr)  
   first obs. used      1995-11-14  
   last obs. used      2019-09-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58106  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:13:42  

Additional Information
 Earth MOID = 1.49221 au 
 Jupiter MOID = 1.59578 au 
 T_jup = 3.141 
[ 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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