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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08054167262652279 4.5039e-08  
a 2.866590317839731 1.357e-08 au
q 2.635710338905923 1.2553e-07 au
i 1.29091644886168 3.6112e-06 deg
node 216.4411705882849 0.00017233 deg
peri 170.3567964532423 0.00017425 deg
M 88.94241758798167 2.4061e-05 deg
tp 2458762.520986902467
(2019-Oct-06.02098690)
0.00011894 TDB
period 1772.747458310797
4.85
1.2588e-05
3.446e-08
d
yr
n .2030746107192472 1.442e-09 deg/d
Q 3.097470296773538 1.4663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1685  
   data-arc span      11079 days (30.33 yr)  
   first obs. used      1990-11-19  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48874  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:48:15  

Additional Information
 Earth MOID = 1.6386 au 
 Jupiter MOID = 2.28584 au 
 T_jup = 3.294 
[ 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 14.39   n/a MPCxxxxx  

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

Alternate Designations
 1999 OQ = 1997 EG19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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