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18838 Shannon (1999 OQ)
Classification: Main-belt Asteroid          SPK-ID: 2018838
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08039266677961371 4.7118e-08  
a 2.866229197863587 1.5038e-08 au
q 2.63580538904574 1.3356e-07 au
i 1.291029711436483 4.4559e-06 deg
node 216.4518980742823 0.00017348 deg
peri 170.2983177436485 0.00017552 deg
M 48.38557389968224 2.4493e-05 deg
tp 2458762.280013142119
(2019-Oct-05.78001314)
0.00012098 TDB
period 1772.412484899766
4.85
1.3949e-05
3.819e-08
d
yr
n .2031129903829124 1.5985e-09 deg/d
Q 3.096653006681434 1.6247e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1450  
   data-arc span      10929 days (29.92 yr)  
   first obs. used      1990-11-19  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50703  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:12:29  

Additional Information
 Earth MOID = 1.63995 au 
 Jupiter MOID = 2.28644 au 
 T_jup = 3.295 
[ 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 MPO502311  

18838 Shannon           Discovered 1999 July 18 by L. Šarounová and P. Kušnirák at Ondřejov.
American scientist Claude Elwood Shannon (1916-2001) became the father of information science and a cofounder of cybernetics through his numerous fundamental contributions, including the epoch-making paper A Mathematical Theory of Communication (1948).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020128/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1999 OQ = 1997 EG19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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