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268461 (2005 WD156)
Classification: Main-belt Asteroid          SPK-ID: 2268461
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1264968048874568 4.6811e-08  
a 2.427709163663204 1.8341e-08 au
q 2.120611711263809 1.2066e-07 au
i 7.338870529655742 4.1281e-06 deg
node 149.9353847157962 3.9539e-05 deg
peri 188.4162908293839 4.4389e-05 deg
M 16.1253141421724 2.2082e-05 deg
tp 2458938.613047601133
(2020-Mar-30.11304760)
8.4432e-05 TDB
period 1381.635276507591
3.78
1.5657e-05
4.287e-08
d
yr
n .2605608050990019 2.9527e-09 deg/d
Q 2.734806616062599 2.0661e-08 au
  Orbit Determination Parameters
   # obs. used (total)      359  
   data-arc span      6521 days (17.85 yr)  
   first obs. used      2001-10-16  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55487  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 13:03:47  

Additional Information
 Earth MOID = 1.11156 au 
 Jupiter MOID = 2.62853 au 
 T_jup = 3.487 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457551.5 (2016-Jun-12.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1274374779291138 4.6851e-08  
q 2.118631390338697 1.2083e-07 au
tp 2457558.192590103035
(2016-Jun-18.69259010)
7.8209e-05 TDB
node 150.0002935808525 3.9556e-05 deg
peri 188.7642945684863 4.434e-05 deg
i 7.337374941032611 4.1279e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      359  
   data-arc span      6521 days (17.85 yr)  
   first obs. used      2001-10-16  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55487  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 13:03:47  

Additional Information
 Jupiter MOID = 2.62853 au 
 T_jup = 3.487 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.194974090845004E-15 -5.618549759663566E-15 3.640120356882628E-13 1.054907002237376E-14 1.83591333279198E-13 9.516879121679052E-16
q -5.618549759663566E-15 1.459971419038692E-14 -5.363151134991082E-13 -2.26156025515351E-14 -3.757481139144948E-13 -9.861722252912413E-16
tp 3.640120356882628E-13 -5.363151134991082E-13 6.116652416772417E-9 1.746235450795049E-11 1.589716004508109E-9 1.088108019755611E-11
node 1.054907002237376E-14 -2.26156025515351E-14 1.746235450795049E-11 1.56468929155172E-9 -1.546566009541828E-9 2.035275131144031E-11
peri 1.83591333279198E-13 -3.757481139144948E-13 1.589716004508109E-9 -1.546566009541828E-9 1.96605773343205E-9 -1.741366778877997E-11
i 9.516879121679052E-16 -9.861722252912413E-16 1.088108019755611E-11 2.035275131144031E-11 -1.741366778877997E-11 1.703931149134126E-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 16.1   n/a MPO437234  

268461 (2005 WD156)          Discovered 2005-Nov-29 by NEAT at Palomar
Reference: 20110319/Numbers.arcLast Updated: 2011-03-23

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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