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26909 Lefschetz (1996 HY1)
Classification: Main-belt Asteroid          SPK-ID: 2026909
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1741891314633515 5.6969e-08  
a 2.61242705419161 1.7286e-08 au
q 2.157370654610612 1.522e-07 au
i 12.18361969515923 6.1916e-06 deg
node .8299813912464639 1.7303e-05 deg
peri 357.7378151686947 2.0478e-05 deg
M 29.91139778517822 1.0383e-05 deg
tp 2458472.355817883117
(2018-Dec-19.85581788)
4.418e-05 TDB
period 1542.285181501523
4.22
1.5307e-05
4.191e-08
d
yr
n .2334198657407282 2.3167e-09 deg/d
Q 3.067483453772609 2.0297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1641  
   data-arc span      8602 days (23.55 yr)  
   first obs. used      1996-04-24  
   last obs. used      2019-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50058  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:58:27  

Additional Information
 Earth MOID = 1.15305 au 
 Jupiter MOID = 2.37798 au 
 T_jup = 3.356 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO459044  
diameter diameter 3.206 km 0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.394   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

26909 Lefschetz           Discovered 1996 Apr. 24 by P. G. Comba at Prescott.
Solomon Lefschetz (1884-1972), professor at Princeton University, made important contributions in algebraic geometry and algebraic topology. As a result of war work he became an expert on non-linear differential equations and control theory and made Princeton a leading center in those disciplines.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011130/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1996 HY1 = 1999 CK85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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