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186805 (2004 EW61)
Classification: Main-belt Asteroid          SPK-ID: 2186805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237128652145379 4.3563e-08  
a 2.365503695285991 1.4733e-08 au
q 2.072860455466584 1.095e-07 au
i 5.702939691365342 6.2594e-06 deg
node 181.5966123850053 4.2949e-05 deg
peri 273.0581384802401 5.0717e-05 deg
M 336.7385649789127 2.9811e-05 deg
tp 2459482.365336377944
(2021-Sep-24.86533638)
0.00011043 TDB
period 1328.874210384588
3.64
1.2415e-05
3.399e-08
d
yr
n .2709060023791212 2.531e-09 deg/d
Q 2.658146935105398 1.6556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      6587 days (18.03 yr)  
   first obs. used      2002-10-05  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61733  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:52:46  

Additional Information
 Earth MOID = 1.09893 au 
 Jupiter MOID = 2.50732 au 
 T_jup = 3.531 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457995.5 (2017-Aug-30.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .123769495198605 4.3565e-08  
q 2.073301628226265 1.0965e-07 au
tp 2458149.447232257584
(2018-Jan-30.94723226)
0.00010465 TDB
node 181.735998882556 4.2957e-05 deg
peri 272.0423642188809 5.0715e-05 deg
i 5.70177267303133 6.2571e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      243  
   data-arc span      6587 days (18.03 yr)  
   first obs. used      2002-10-05  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61733  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:52:46  

Additional Information
 Jupiter MOID = 2.50732 au 
 T_jup = 3.531 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.897925649468732E-15 -4.750162818008144E-15 -5.804914851301177E-13 8.497767086414333E-15 -1.001459983167199E-13 -2.969106576205517E-15
q -4.750162818008144E-15 1.202411090616274E-14 1.940262760304226E-12 -1.883578082437804E-14 3.707271463493824E-13 8.07434535323099E-15
tp -5.804914851301177E-13 1.940262760304226E-12 1.095062783285679E-8 3.365504436590507E-11 2.832284349607751E-9 8.94568821957177E-12
node 8.497767086414333E-15 -1.883578082437804E-14 3.365504436590507E-11 1.845318055291035E-9 -1.826199396355452E-9 -4.743788587998314E-11
peri -1.001459983167199E-13 3.707271463493824E-13 2.832284349607751E-9 -1.826199396355452E-9 2.572061378067856E-9 4.935469389043832E-11
i -2.969106576205517E-15 8.07434535323099E-15 8.94568821957177E-12 -4.743788587998314E-11 4.935469389043832E-11 3.915169129366408E-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 17.44   n/a MPCxxxxx  

186805 (2004 EW61)          Discovered 2004-Mar-12 by NEAT at Palomar
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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