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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456666.5 (2014-Jan-09.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2113925076003203 4.0987e-08  
q 2.506284515179787 1.3639e-07 au
tp 2455786.094186529836
(2011-Aug-12.59418653)
8.5031e-05 TDB
node 55.25336348835994 2.7488e-05 deg
peri 257.6890338884476 3.0715e-05 deg
i 10.46195830301199 5.5372e-06 deg
  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
 Jupiter MOID = 1.59824 au 
 T_jup = 3.142 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.679927588674811E-15 -5.537421480948517E-15 1.258620097139699E-12 -1.14437663567528E-14 1.895588548679904E-13 2.290604977103955E-15
q -5.537421480948517E-15 1.860161795629047E-14 -4.629969980519148E-12 4.018135919324407E-14 -6.876083770644925E-13 -7.579846772972508E-15
tp 1.258620097139699E-12 -4.629969980519148E-12 7.230205178993294E-9 1.241820389513905E-11 1.193833099868246E-9 -8.159465951181284E-12
node -1.14437663567528E-14 4.018135919324407E-14 1.241820389513905E-11 7.555753171515798E-10 -7.41972867749976E-10 -5.016682475830375E-11
peri 1.895588548679904E-13 -6.876083770644925E-13 1.193833099868246E-9 -7.41972867749976E-10 9.433825870335385E-10 4.829547258786353E-11
i 2.290604977103955E-15 -7.579846772972508E-15 -8.159465951181284E-12 -5.016682475830375E-11 4.829547258786353E-11 3.066069982001711E-11

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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