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JPL Small-Body Database Browser
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7269 Alprokhorov (1975 VK2)
Classification: Main-belt Asteroid          SPK-ID: 2007269
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1084859671672251 3.5089e-08  
a 2.995776347359961 1.4339e-08 au
q 2.67077665289992 1.0537e-07 au
i 2.934997019199232 3.7511e-06 deg
node 84.16221587187469 7.5644e-05 deg
peri 280.2657226049988 7.7638e-05 deg
M 222.4801250871741 1.9291e-05 deg
tp 2459723.978244452320
0.00010396 TDB
period 1893.923828595223
n .1900815621856462 1.3647e-09 deg/d
Q 3.320776041820004 1.5894e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2154  
   data-arc span      25342 days (69.38 yr)  
   first obs. used      1950-12-09  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49531  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:44:19  

Additional Information
 Earth MOID = 1.67069 au 
 Jupiter MOID = 2.13575 au 
 T_jup = 3.244 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO473866  
diameter diameter 6.879 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.340   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7269 Alprokhorov           Discovered 1975 Nov. 2 by T. M. Smirnova at the Crimean Astrophysical Observatory.
Aleksandr Mikhajlovich Prokhorov (b. 1916), renowned for fundamental research in quantum electronics that led to the creation of masers and lasers, was the 1964 recipient (with N. G. Basov and C. H. Townes) of the Nobel prize for physics and is honorary director of the Russian Academy of Sciences' General Physics Institute.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990928/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1975 VK2 = 1975 WY1 = 1985 RY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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