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JPL Small-Body Database Browser
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2142 Landau (1972 GA)
Classification: Main-belt Asteroid          SPK-ID: 2002142
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172435785773858 4.2187e-08  
a 3.163990880028448 1.6784e-08 au
q 2.793033266667701 1.3206e-07 au
i .66429693375077 4.3061e-06 deg
node 155.5823488585501 0.00033428 deg
peri 32.86744353603872 0.00033459 deg
M 132.9546872846591 1.6102e-05 deg
tp 2457841.306618234412
(2017-Mar-28.80661823)
8.9519e-05 TDB
period 2055.659886969231
5.63
1.6357e-05
4.478e-08
d
yr
n .1751262464583902 1.3935e-09 deg/d
Q 3.534948493389195 1.8751e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2421  
   data-arc span      24923 days (68.24 yr)  
   first obs. used      1951-08-06  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49051  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:12:58  

Additional Information
 Earth MOID = 1.79426 au 
 Jupiter MOID = 1.42309 au 
 T_jup = 3.193 
[ 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 12.0   n/a MPO319109  
diameter diameter 20.134 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 19.2 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:
[Hayes-Gehrke, M.N.; Arrington, K.; Brady, J.; Christian, S.; et al. (2017) Minor Planet Bull. 44, 306-307.]
geometric albedo albedo 0.050   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2142 Landau           Discovered 1972 Apr. 3 by L. I. Chernykh at the Crimean Astrophysical Observatory.
Named in memory of Lev Davydovich Landau (1908-1968), founder of the study of modern theoretical physics in the U.S.S.R. Among his accomplishments was fundamental research in quantum electrodynamics, superconductivity and neutrino theory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5284Last Updated: 2007-10-23

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Alternate Designations
 1972 GA = 1960 DB = 1974 SL1 = 1977 EE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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