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JPL Small-Body Database Browser
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38442 Szilard (1999 SU6)
Classification: Main-belt Asteroid          SPK-ID: 2038442
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0740896545962782 3.3128e-08  
a 2.901747184538038 1.4758e-08 au
q 2.686757737909892 9.6372e-08 au
i .8899124781870169 3.6894e-06 deg
node 321.7340902110083 0.0002586 deg
peri 359.5216495708634 0.00026022 deg
M 40.60768305138703 3.0137e-05 deg
tp 2458396.845742158706
(2018-Oct-05.34574216)
0.00015107 TDB
period 1805.459639991988
4.94
1.3774e-05
3.771e-08
d
yr
n .1993952077497548 1.5212e-09 deg/d
Q 3.116736631166183 1.5852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1699  
   data-arc span      9131 days (25.00 yr)  
   first obs. used      1994-10-31  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52151  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:45:48  

Additional Information
 Earth MOID = 1.67307 au 
 Jupiter MOID = 2.10446 au 
 T_jup = 3.282 
[ 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 14.0   n/a MPO412454  
diameter diameter 4.619 km 0.357 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.208   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

38442 Szilárd           Discovered 1999 Sept. 24 by K. Sárneczky and G. Szabó at Piszkesteto.
Hungarian-American physicist Leó Szilárd (1898-1964) conceived the nuclear chain reaction and worked with Fermi on the first nuclear reactor. After World War II he changed his research field to molecular biology because of his horror of nuclear weapons. He was a founder of the Council for a Livable World.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

[ show close-approach data ]
Alternate Designations
 1999 SU6 = 2000 YR54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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