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4420 Alandreev (1936 PB)
Classification: Main-belt Asteroid          SPK-ID: 2004420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3179701425618737 3.9819e-08  
a 2.674061347548217 8.8606e-09 au
q 1.823789679649114 1.079e-07 au
i 6.906290994432255 4.472e-06 deg
node 302.4405697460734 3.4519e-05 deg
peri 1.278094669275871 3.506e-05 deg
M 337.7891800834743 5.7171e-06 deg
tp 2458699.041136491172
(2019-Aug-03.54113649)
2.5461e-05 TDB
period 1597.185933258914
4.37
7.9385e-06
2.173e-08
d
yr
n .2253964253651122 1.1203e-09 deg/d
Q 3.52433301544732 1.1678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2002  
   data-arc span      30349 days (83.09 yr)  
   first obs. used      1936-08-15  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47434  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:46:01  

Additional Information
 Earth MOID = .807772 au 
 Jupiter MOID = 1.7404 au 
 T_jup = 3.295 
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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 12.5   n/a MPO435740  
diameter diameter 16.028 km 0.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4420 Alandreev           Discovered 1936 Aug. 15 by G. N. Neujmin at Simeis.
Aleksandr Fedorovich Andreev (b. 1939), vice-president of the Russian Academy of Sciences and director of the P. Kapitsa Institute of Physical Problems in Moscow, is a specialist in the physics of low temperature and condensed matter. He predicted the so-called Andreev reflection effect.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000726/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1936 PB = 1949 OB = 1958 TL = 1967 TD = 1971 OD1 = 1971 QB = 1987 DY1 
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