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295863 (2008 WA4)
Classification: Main-belt Asteroid          SPK-ID: 2295863
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06504160126032617 4.6411e-08  
a 2.231575388450746 1.3866e-08 au
q 2.086430151852775 9.8267e-08 au
i 2.211590319964818 6.0724e-06 deg
node 193.4147500755841 0.00010766 deg
peri 251.7117591762944 0.00011695 deg
M 129.9585550734501 4.6998e-05 deg
tp 2458560.940020255581
(2019-Mar-18.44002026)
0.000158 TDB
period 1217.631210338985
3.33
1.1349e-05
3.107e-08
d
yr
n .2956560220723786 2.7556e-09 deg/d
Q 2.376720625048717 1.4768e-08 au
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      6823 days (18.68 yr)  
   first obs. used      2001-08-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52923  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:44:56  

Additional Information
 Earth MOID = 1.10377 au 
 Jupiter MOID = 2.73195 au 
 T_jup = 3.638 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457550.5 (2016-Jun-11.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06457805803804646 4.6242e-08  
q 2.088066365609023 9.7749e-08 au
tp 2457344.659043805579
(2015-Nov-18.15904381)
0.00015745 TDB
node 193.4226975038162 0.00010771 deg
peri 252.2418191528165 0.00011715 deg
i 2.210389623761294 6.0719e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      6823 days (18.68 yr)  
   first obs. used      2001-08-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52923  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:44:56  

Additional Information
 Jupiter MOID = 2.73195 au 
 T_jup = 3.638 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.138321809716028E-15 -4.488851765419439E-15 -1.514313652283845E-12 -3.814378620782054E-15 -4.68701128572684E-13 -9.864069779951287E-17
q -4.488851765419439E-15 9.554819978748945E-15 3.652601203582415E-12 9.681475069080814E-15 1.126848770712349E-12 3.805670607053388E-16
tp -1.514313652283845E-12 3.652601203582415E-12 2.479161668403077E-8 4.184780940519778E-11 7.26565759825329E-9 9.706966370550004E-13
node -3.814378620782054E-15 9.681475069080814E-15 4.184780940519778E-11 1.160041799430277E-8 -1.157895450417457E-8 7.604219698258949E-11
peri -4.68701128572684E-13 1.126848770712349E-12 7.26565759825329E-9 -1.157895450417457E-8 1.372381881398303E-8 -7.568190000078547E-11
i -9.864069779951287E-17 3.805670607053388E-16 9.706966370550004E-13 7.604219698258949E-11 -7.568190000078547E-11 3.686795202844699E-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 18.1   n/a MPO413252  

295863 (2008 WA4)          Discovered 2008-Nov-17 by Spacewatch at Kitt Peak
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

[ show close-approach data ]
Alternate Designations
 2008 WA4 = 2001 QP186 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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