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18750 Leonidakimov (1999 GA9)
Classification: Main-belt Asteroid          SPK-ID: 2018750
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2359206823732099 7.1519e-08  
a 2.608502188104445 2.2407e-08 AU
q 1.993102571914833 1.8481e-07 AU
i 5.631318490877877 7.268e-06 deg
node 100.4193687703095 7.3409e-05 deg
peri 196.7248051453026 7.4769e-05 deg
M 203.097386696269 1.7084e-05 deg
tp 2457671.176225055398
(2016-Oct-09.67622506)
7.6844e-05 JED
period 1538.810832631313
4.21
1.9828e-05
5.429e-08
d
yr
n .2339468844162037 3.0144e-09 deg/d
Q 3.223901804294057 2.7693e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      8732 days (23.91 yr)  
   first obs. used      1991-07-15  
   last obs. used      2015-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56822  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:23:41  

Additional Information
 Earth MOID = .97915 AU 
 T_jup = 3.364 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8 mag n/a MPO337417  

18750 Leonidakimov           Discovered 1999 Apr. 10 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Leonid Afanas'evich Akimov (b. 1937) is a Ukrainian planetary scientist. An expert in lunar photometry, he was one of the earliest to study the opposition effect, and additionally made laboratory measurements of lunar regolith particles. The name was suggested by D. F. Lupishko and Yu. G. Shkuratov.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080321/MPCPages.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 1999 GA9 = 1991 NP7 = 1996 XH11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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