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305849 (2009 EW4)
Classification: Main-belt Asteroid          SPK-ID: 2305849
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05682562964110376 4.8112e-08  
a 2.860364935246333 3.1842e-08 au
q 2.697822896797625 1.4844e-07 au
i 6.75166170407366 4.926e-06 deg
node 143.0658559691867 4.2117e-05 deg
peri 157.7347552791864 6.1155e-05 deg
M 357.692143153838 4.505e-05 deg
tp 2459011.827575377240
(2020-Jun-11.32757538)
0.00022117 TDB
period 1766.97577347061
4.84
2.9505e-05
8.078e-08
d
yr
n .2037379376701385 3.4021e-09 deg/d
Q 3.022906973695041 3.3651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      263  
   data-arc span      9134 days (25.01 yr)  
   first obs. used      1995-04-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:01:29  

Additional Information
 Earth MOID = 1.68393 au 
 Jupiter MOID = 2.12934 au 
 T_jup = 3.289 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457497.5 (2016-Apr-19.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05613825217700166 4.8117e-08  
q 2.698274354691488 1.4775e-07 au
tp 2457256.145030111630
(2015-Aug-21.64503011)
0.00021786 TDB
node 143.1506527279031 4.2183e-05 deg
peri 159.6496984373735 6.1692e-05 deg
i 6.747078423722293 4.9228e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      263  
   data-arc span      9134 days (25.01 yr)  
   first obs. used      1995-04-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:01:29  

Additional Information
 Jupiter MOID = 2.12934 au 
 T_jup = 3.289 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.315205381067851E-15 -6.975924821424016E-15 -1.314716347383425E-13 -1.760939045135729E-14 4.281896705468693E-14 -1.230690718327056E-15
q -6.975924821424016E-15 2.18297399744061E-14 1.496801012422284E-12 5.367009756375689E-14 1.147292875415733E-13 5.682780342682614E-15
tp -1.314716347383425E-13 1.496801012422284E-12 4.746117823352217E-8 -4.142051841112716E-11 9.833589776429704E-9 1.188011527050781E-11
node -1.760939045135729E-14 5.367009756375689E-14 -4.142051841112716E-11 1.779392396070763E-9 -1.775386294847945E-9 -4.468297168882096E-12
peri 4.281896705468693E-14 1.147292875415733E-13 9.833589776429704E-9 -1.775386294847945E-9 3.805909721766619E-9 6.918899698607444E-12
i -1.230690718327056E-15 5.682780342682614E-15 1.188011527050781E-11 -4.468297168882096E-12 6.918899698607444E-12 2.423366549517895E-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 16.0   n/a MPO476362  

305849 (2009 EW4)          Discovered 2009-Mar-15 by La Sagra at La Sagra
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

Alternate Designations
 2009 EW4 = 1999 FS60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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