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216876 (2008 EL54)
Classification: Jupiter Trojan          SPK-ID: 2216876
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699314073369635 5.5767e-08  
a 5.228838375603137 1.2812e-07 au
q 4.340294511699374 3.6365e-07 au
i 12.16292800174973 8.4618e-06 deg
node 175.3887151525165 2.523e-05 deg
peri 108.1892957623612 3.6203e-05 deg
M 318.8217196355563 2.6807e-05 deg
tp 2459700.041943511705
(2022-Apr-30.54194351)
0.0003326 TDB
period 4367.231901687103
11.96
0.00016051
4.395e-07
d
yr
n .08243207782507005 3.0297e-09 deg/d
Q 6.1173822395069 1.4989e-07 au
  Orbit Determination Parameters
   # obs. used (total)      277  
   data-arc span      8654 days (23.69 yr)  
   first obs. used      1997-06-03  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:37  

Additional Information
 Earth MOID = 3.34848 au 
 Jupiter MOID = .0422752 au 
 T_jup = 2.927 
[ 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 13.20   n/a E2021B55  
diameter diameter 12.205 km 0.440 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.075   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

216876 (2008 EL54)          Discovered 2008-Mar-06 by Spacewatch at Kitt Peak
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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