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172609 (2003 WA87)
Classification: Main-belt Asteroid          SPK-ID: 2172609
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1644884180917277 6.0023e-08  
a 2.38073799129203 1.6515e-08 au
q 1.989134165213527 1.3636e-07 au
i 23.3235651596702 8.7864e-06 deg
node 279.8700602238598 1.3425e-05 deg
peri 139.5176136598845 2.913e-05 deg
M 187.0031516822245 2.7288e-05 deg
tp 2459645.265098503089
(2022-Mar-06.76509850)
0.00010602 TDB
period 1341.732162858497
3.67
1.3961e-05
3.822e-08
d
yr
n .2683098832728562 2.7919e-09 deg/d
Q 2.772341817370533 1.9232e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7550 days (20.67 yr)  
   first obs. used      1999-10-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52876  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:30:35  

Additional Information
 Earth MOID = 1.04054 au 
 Jupiter MOID = 2.55268 au 
 T_jup = 3.411 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457207.5 (2015-Jul-04.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1643628043071169 6.0322e-08  
q 1.9898436706129 1.3715e-07 au
tp 2456963.262347879267
(2014-Nov-01.76234788)
9.0377e-05 TDB
node 279.915611615223 1.3419e-05 deg
peri 139.8072697175376 2.9094e-05 deg
i 23.32435978897764 8.7875e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7550 days (20.67 yr)  
   first obs. used      1999-10-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52876  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:30:35  

Additional Information
 Jupiter MOID = 2.55268 au 
 T_jup = 3.411 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.638689990723946E-15 -8.242437320244461E-15 2.642710111287015E-12 3.112685392650458E-14 6.937351447096045E-13 -2.098806439319915E-15
q -8.242437320244461E-15 1.881100778510652E-14 -5.747370594490831E-12 -6.803906972702954E-14 -1.495934145439154E-12 3.478207263038157E-15
tp 2.642710111287015E-12 -5.747370594490831E-12 8.168057361782298E-9 4.234173711836056E-11 2.347906957219049E-9 -9.613535761865594E-12
node 3.112685392650458E-14 -6.803906972702954E-14 4.234173711836056E-11 1.800643380102879E-10 -1.5259303701372E-10 3.556977900305701E-11
peri 6.937351447096045E-13 -1.495934145439154E-12 2.347906957219049E-9 -1.5259303701372E-10 8.464779525621696E-10 -3.539233326278039E-11
i -2.098806439319915E-15 3.478207263038157E-15 -9.613535761865594E-12 3.556977900305701E-11 -3.539233326278039E-11 7.721990839558678E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO334056  
diameter diameter 2.106 km 0.416 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.302   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172609 (2003 WA87)          Discovered 2003-Nov-21 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

Alternate Designations
 2003 WA87 = 1999 TY206 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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