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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05682563668752635 4.4666e-08  
a 2.860364925863767 2.2873e-08 au
q 2.697822867792889 1.2981e-07 au
i 6.751662150697115 4.879e-06 deg
node 143.065891058716 3.01e-05 deg
peri 157.7347108989526 4.8934e-05 deg
M 357.692154755047 3.6133e-05 deg
tp 2459011.827518379686
(2020-Jun-11.32751838)
0.00017732 TDB
period 1766.975764776563
4.84
2.1195e-05
5.803e-08
d
yr
n .2037379386725899 2.4438e-09 deg/d
Q 3.022906983934645 2.4173e-08 au
  Orbit Determination Parameters
   # obs. used (total)      342  
   data-arc span      9309 days (25.49 yr)  
   first obs. used      1995-04-26  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52597  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:10:30  

Additional Information
 Earth MOID = 1.68393 au 
 Jupiter MOID = 2.12934 au 
 T_jup = 3.289 
[ show covariance matrix ]

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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