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17696 Bombelli (1997 EH8)
Classification: Main-belt Asteroid          SPK-ID: 2017696
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 .08303119404562044 3.2195e-08  
a 3.023647899680455 1.7697e-08 au
q 2.772590804196454 1.0358e-07 au
i 9.712778499248399 4.9512e-06 deg
node 352.570007401019 2.0351e-05 deg
peri 80.23897871237932 4.2599e-05 deg
M 277.5223394147215 4.0199e-05 deg
tp 2459640.476099381675
(2022-Mar-01.97609938)
0.00021664 TDB
period 1920.415718067475
5.26
1.686e-05
4.616e-08
d
yr
n .1874594113207269 1.6457e-09 deg/d
Q 3.274704995164456 1.9166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1809  
   data-arc span      11428 days (31.29 yr)  
   first obs. used      1989-09-30  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47367  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:10:21  

Additional Information
 Earth MOID = 1.80737 au 
 Jupiter MOID = 1.9621 au 
 T_jup = 3.218 
[ 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 13.32   n/a E2021B10  
diameter diameter 7.793 km 0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.183   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17696 Bombelli           Discovered 1997 Mar. 8 by P. G. Comba at Prescott.
Rafael Bombelli (1526-1572) was a mathematician of Bologna. His widely read treatise on algebra introduced a consistent procedure for handling imaginary complex numbers, removing some of the mystery from the so-called irreducible case of the solution of the cubic equation.
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
 1997 EH8 = 1989 SA12 = 1999 NZ63 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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