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17891 Buraliforti (1999 EA)
Classification: Main-belt Asteroid          SPK-ID: 2017891
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2560615011827104 6.1857e-08  
a 2.551155920815116 1.1436e-08 au
q 1.897903105980038 1.612e-07 au
i 11.88987283480849 7.1222e-06 deg
node 352.2118493132783 2.4678e-05 deg
peri 287.6846529050905 2.7272e-05 deg
M 350.0605466658027 1.2993e-05 deg
tp 2459041.592629162104
(2020-Jul-11.09262916)
5.377e-05 TDB
period 1488.34608916168
4.07
1.0008e-05
2.74e-08
d
yr
n .2418792259552831 1.6264e-09 deg/d
Q 3.204408735650194 1.4365e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1095  
   data-arc span      10843 days (29.69 yr)  
   first obs. used      1991-03-11  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54167  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:06:35  

Additional Information
 Earth MOID = .921963 au 
 Jupiter MOID = 2.12679 au 
 T_jup = 3.364 
[ 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 14.7   n/a MPO337410  
diameter diameter 3.897 km 1.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17891 Buraliforti           Discovered 1999 Mar. 6 by P. G. Comba at Prescott.
Cesare Burali-Forti (1861-1931) taught at the Military Academy in Turin. He discovered a paradox in Cantor's set theory: since the ordinal number of a set of ordinals is greater than the ordinal of each set element, "the ordinal of the set of all ordinals" is a self-contradictory concept.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010109/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1999 EA = 1991 ER3 
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