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JPL Small-Body Database Browser
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20371 Ekladyous (1998 KE30)
Classification: Main-belt Asteroid          SPK-ID: 2020371
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06978478507662847 3.8836e-08  
a 2.755582406229417 1.6613e-08 au
q 2.563284680249758 1.0615e-07 au
i 6.202445162931466 4.4011e-06 deg
node 250.0657317924951 4.1485e-05 deg
peri 60.63707677728689 5.3341e-05 deg
M 142.5697061189428 3.3923e-05 deg
tp 2457938.827195046019
(2017-Jul-04.32719505)
0.00015774 TDB
period 1670.777167659349
4.57
1.5109e-05
4.137e-08
d
yr
n .2154685896889152 1.9485e-09 deg/d
Q 2.947880132209075 1.7772e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      13666 days (37.42 yr)  
   first obs. used      1981-10-24  
   last obs. used      2019-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54857  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:40:15  

Additional Information
 Earth MOID = 1.55482 au 
 Jupiter MOID = 2.22026 au 
 T_jup = 3.332 
[ 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 14.4   n/a MPO337430  
diameter diameter 7.900 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 184.408 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.065   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20371 Ekladyous           Discovered 1998 May 22 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Nicholas Samir Ekladyous (b. 1991) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his engineering project. He attends the Imlay City Middle School, Imlay City, Michigan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 KE30 = 1981 UW28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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