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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08906578821535861 3.6801e-08  
a 2.976734272952548 1.5666e-08 au
q 2.711609088624356 1.1399e-07 au
i 11.66484457877691 4.0896e-06 deg
node 93.17696623403721 2.0878e-05 deg
peri 331.4333569066821 3.3085e-05 deg
M 10.41316589065822 2.4255e-05 deg
tp 2459146.238872359554
(2020-Oct-23.73887236)
0.00012642 TDB
period 1875.895011725952
5.14
1.4809e-05
4.054e-08
d
yr
n .1919083945261816 1.515e-09 deg/d
Q 3.241859457280739 1.7062e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      12794 days (35.03 yr)  
   first obs. used      1986-03-04  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:19:41  

Additional Information
 Earth MOID = 1.73144 au 
 Jupiter MOID = 2.02224 au 
 T_jup = 3.224 
[ 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 13.51   n/a MPCxxxxx  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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