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31982 Johnwallis (2000 HS20)
Classification: Outer Main-belt Asteroid          SPK-ID: 2031982
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .153751252785472 7.6328e-08  
a 3.200245975781786 5.25e-08 au
q 2.708204147783671 2.5578e-07 au
i 2.246613255198944 1.0681e-05 deg
node 239.0255074029392 0.00025247 deg
peri 24.58476196254632 0.0002554 deg
M 251.2268678567471 4.0879e-05 deg
tp 2458032.318881852658
(2017-Oct-05.81888185)
0.00024426 JED
period 2091.093572329992
5.73
5.1456e-05
1.409e-07
d
yr
n .1721587234371686 4.2364e-09 deg/d
Q 3.692287803779901 6.0572e-08 au
  Orbit Determination Parameters
   # obs. used (total)      336  
   data-arc span      6653 days (18.21 yr)  
   first obs. used      1996-10-05  
   last obs. used      2014-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59814  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 03:26:09  

Additional Information
 Earth MOID = 1.6914 au 
 Jupiter MOID = 1.38016 au 
 T_jup = 3.175 
[ 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 15.0 mag n/a MPO272791  

31982 Johnwallis           Discovered 2000 Apr. 30 by P. G. Comba at Prescott.
John Wallis (1616-1703) was an professor of geometry at Oxford. His fame rests on a formula that represents \pi as an infinite product and on the invention of the symbol {i}nfty for infinity.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

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