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117677 (2005 EL221)
Classification: Main-belt Asteroid          SPK-ID: 2117677
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04146983650829016 4.5706e-08  
a 3.072145309238304 2.8126e-08 au
q 2.944743945534481 1.3666e-07 au
i 3.236778763622891 4.681e-06 deg
node 218.2835127508259 7.5997e-05 deg
peri 131.2380014508335 9.4221e-05 deg
M 145.446661180196 5.6961e-05 deg
tp 2458205.874838742924
(2018-Mar-28.37483874)
0.0003103 TDB
period 1966.803883508451
5.38
2.701e-05
7.395e-08
d
yr
n .1830380766575566 2.5136e-09 deg/d
Q 3.199546672942127 2.9293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      7656 days (20.96 yr)  
   first obs. used      1999-02-16  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54715  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 05:49:09  

Additional Information
 Earth MOID = 1.93957 au 
 Jupiter MOID = 1.99282 au 
 T_jup = 3.227 
[ 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 15.3   n/a MPO412804  
diameter diameter 4.940 km 1.387 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117677 (2005 EL221)          Discovered 2005-Mar-11 by Mt. Lemmon Survey at Mt. Lemmon
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2005 EL221 = 2000 HA94 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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