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216771 (2005 WC45)
Classification: Outer Main-belt Asteroid          SPK-ID: 2216771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04356797934693214 6.151e-08  
a 3.969753349971727 7.4202e-08 au
q 3.796799218007745 2.322e-07 au
i .7478905529151585 6.038e-06 deg
node 247.7500438686819 0.00049269 deg
peri 283.012818788453 0.00049853 deg
M 228.2201773791489 7.7649e-05 deg
tp 2460258.023752327633
(2023-Nov-09.52375233)
0.00064006 TDB
period 2888.974527863036
7.91
8.1001e-05
2.218e-07
d
yr
n .1246116905939945 3.4938e-09 deg/d
Q 4.142707481935711 7.7435e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7167 days (19.62 yr)  
   first obs. used      2001-04-24  
   last obs. used      2020-12-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:13  

Additional Information
 Earth MOID = 2.80197 au 
 Jupiter MOID = .833268 au 
 T_jup = 3.056 
[ 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 15.21   n/a MPCxxxxx  

216771 (2005 WC45)          Discovered 2005-Nov-22 by Spacewatch at Kitt Peak
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Alternate Designations
 2005 WC45 = 2007 CN9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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