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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08362533871624946 3.7309e-08  
a 3.027231650035227 1.9757e-08 au
q 2.774078377928481 1.1533e-07 au
i 9.696566414282122 6.0168e-06 deg
node 352.9071761839137 2.4393e-05 deg
peri 77.87975691064395 4.6101e-05 deg
M 167.4919367813333 4.0488e-05 deg
tp 2457705.427294979041
(2016-Nov-12.92729498)
0.00021232 TDB
period 1923.830961655324
5.27
1.8834e-05
5.156e-08
d
yr
n .1871266276379318 1.8319e-09 deg/d
Q 3.280384922141975 2.1409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1359  
   data-arc span      10914 days (29.88 yr)  
   first obs. used      1989-09-30  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50751  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:24:40  

Additional Information
 Earth MOID = 1.80823 au 
 Jupiter MOID = 1.96944 au 
 T_jup = 3.217 
[ 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 13.2   n/a MPO347662  
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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