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JPL Small-Body Database Browser
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20037 Duke (1992 UW4)
Classification: Mars-crossing Asteroid          SPK-ID: 2020037
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1205763808955186 4.5988e-08  
a 1.883923140838362 6.7473e-09 au
q 1.656766506630754 8.4537e-08 au
i 22.54635386538133 6.1141e-06 deg
node 228.6523545399284 1.0766e-05 deg
peri 95.48141933493235 3.0523e-05 deg
M 145.390621252615 3.2651e-05 deg
tp 2458219.059248379904
8.4631e-05 TDB
period 944.4809396931075
n .3811617417255405 2.0477e-09 deg/d
Q 2.11107977504597 7.5609e-09 au
  Orbit Determination Parameters
   # obs. used (total)      935  
   data-arc span      9659 days (26.44 yr)  
   first obs. used      1992-10-20  
   last obs. used      2019-04-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48738  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:35:11  

Additional Information
 Earth MOID = .778764 au 
 Jupiter MOID = 3.14796 au 
 T_jup = 3.865 
[ 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 15.2   n/a MPO467936  
diameter diameter 1.796 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 5.428 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2011) Minor Planet Bull. 38, 33-36.]
[Stephens, R.D. (2016) Minor Planet Bull. 43, 52-56.]
geometric albedo albedo 0.547   0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

20037 Duke           Discovered 1992 Oct. 20 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Michael B. Duke (b. 1935) is a scholar of distinction on lunar, Mars and meteorite research, with a broad perspective and knowledge of the history of space exploration. Curator of the lunar samples returned from the moon, he moved on to become chief of the Lunar and Planetary Sciences Division of the Johnson Spacecraft Center.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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