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243299 (2008 EN109)
Classification: Main-belt Asteroid          SPK-ID: 2243299
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795967339075965 6.1788e-08  
a 3.128082181315949 3.7178e-08 au
q 2.566288838157055 2.1731e-07 au
i 4.636485488371252 5.4223e-06 deg
node 327.2758297623411 6.4084e-05 deg
peri 327.2179534830315 6.7239e-05 deg
M 313.4983431839893 1.7316e-05 deg
tp 2459261.524687430694
(2021-Feb-16.02468743)		 9.7966e-05 TDB
period 2020.764289041335
5.53		 3.6026e-05
9.863e-08		 d
yr
n .1781504166281494 3.176e-09 deg/d
Q 3.689875524474844 4.3855e-08 au
   Orbit Determination Parameters
   # obs. used (total)      231  
   data-arc span      21763 days (59.58 yr)  
   first obs. used      1960-09-25  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55776  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 12:47:30  

Additional Information
 Earth MOID = 1.55188 au 
 Jupiter MOID = 1.54 au 
 T_jup = 3.184 
[ 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 15.9   n/a MPO470594  
diameter diameter 4.424 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.036   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243299 (2008 EN109)          Discovered 2008-Mar-07 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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