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20403 Attenborough (1998 OW11)
Classification: Main-belt Asteroid          SPK-ID: 2020403
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08636196831670825 6.4931e-08  
a 2.977729376437591 2.7387e-08 au
q 2.720566806373956 1.9321e-07 au
i 11.64357356757883 7.0548e-06 deg
node 93.36825150677333 3.6071e-05 deg
peri 329.5025166603187 6.2984e-05 deg
M 65.42202810671765 4.7674e-05 deg
tp 2457259.426665159073
(2015-Aug-24.92666516)
0.00024923 JED
period 1876.835740133925
5.14
2.5892e-05
7.089e-08
d
yr
n .1918122040740292 2.6462e-09 deg/d
Q 3.234891946501226 2.9752e-08 au
  Orbit Determination Parameters
   # obs. used (total)      846  
   data-arc span      10992 days (30.09 yr)  
   first obs. used      1986-03-04  
   last obs. used      2016-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53341  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:34:43  

Additional Information
 Earth MOID = 1.73978 au 
 Jupiter MOID = 2.03802 au 
 T_jup = 3.224 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a MPO319340  

20403 Attenborough           Discovered 1998 July 22 by J. Broughton at Reedy Creek Observatory.
Englishman David Attenborough (b. 1927) is by common consent the world's foremost naturalist and broadcaster of wildlife documentaries. His brother Richard (b. 1923) is a fine character actor whose first attempt at producing and directing resulted in the 1982 Oscar-winning epic Gandhi.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011230/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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