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JPL Small-Body Database Browser
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249431 (2009 EK28)
Classification: Main-belt Asteroid          SPK-ID: 2249431
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340137373800495 9.9736e-08  
a 2.616337377091269 3.9946e-08 au
q 2.004078489231025 2.6271e-07 au
i 17.90365167536686 1.0666e-05 deg
node 3.008118335866584 2.5618e-05 deg
peri 7.898697546679594 3.3564e-05 deg
M 284.605492928133 2.2666e-05 deg
tp 2458924.225008279655
(2020-Mar-15.72500828)
0.00010174 TDB
period 1545.749252920872
4.23
3.54e-05
9.692e-08
d
yr
n .2328967646723674 5.3338e-09 deg/d
Q 3.228596264951513 4.9294e-08 au
  Orbit Determination Parameters
   # obs. used (total)      285  
   data-arc span      5265 days (14.41 yr)  
   first obs. used      2003-11-24  
   last obs. used      2018-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6188  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 09:55:51  

Additional Information
 Earth MOID = 1.00364 au 
 Jupiter MOID = 2.23771 au 
 T_jup = 3.301 
[ 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 15.8   n/a MPO446304  
diameter diameter 4.140 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249431 (2009 EK28)          Discovered 2009-Mar-02 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2009 EK28 = 2003 WG190 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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