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277518 (2005 WD208)
Classification: Main-belt Asteroid          SPK-ID: 2277518
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04747481961995452 6.2568e-08  
a 2.561884934225116 3.0398e-08 au
q 2.4402599090857 1.692e-07 au
i 2.017125828102912 6.5372e-06 deg
node 311.3861209461392 0.00030517 deg
peri 158.7351795217272 0.00033522 deg
M 166.8874986469123 0.00014083 deg
tp 2458306.180822184669
(2018-Jul-06.68082218)
0.00058231 TDB
period 1497.74492421601
4.10
2.6657e-05
7.298e-08
d
yr
n .240361355381285 4.278e-09 deg/d
Q 2.683509959364533 3.1841e-08 au
  Orbit Determination Parameters
   # obs. used (total)      109  
   data-arc span      5368 days (14.70 yr)  
   first obs. used      2004-07-17  
   last obs. used      2019-03-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65739  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 08:07:33  

Additional Information
 Earth MOID = 1.45704 au 
 Jupiter MOID = 2.35693 au 
 T_jup = 3.432 
[ 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 17.5   n/a MPO281476  

277518 (2005 WD208)          Discovered 2005-Nov-25 by Spacewatch at Kitt Peak
Reference: 20110517/Numbers.arcLast Updated: 2011-05-20

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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