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18751 Yualexandrov (1999 GO9)
Classification: Main-belt Asteroid          SPK-ID: 2018751
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .25128405967637 3.0097e-08  
a 2.228178287700387 5.3926e-09 au
q 1.668272601884291 6.821e-08 au
i 4.64336094104142 3.4179e-06 deg
node 343.657704174476 3.5141e-05 deg
peri 328.8117772197352 3.5634e-05 deg
M 115.9208615068891 5.9046e-06 deg
tp 2458809.314784055445
(2019-Nov-21.81478406)
1.9399e-05 TDB
period 1214.851890413794
3.33
4.4102e-06
1.207e-08
d
yr
n .2963324194831515 1.0758e-09 deg/d
Q 2.788083973516483 6.7476e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2623  
   data-arc span      10016 days (27.42 yr)  
   first obs. used      1993-10-08  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42217  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:37:07  

Additional Information
 Earth MOID = .654549 au 
 Jupiter MOID = 2.50767 au 
 T_jup = 3.598 
[ 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 14.89   n/a MPCxxxxx  
rotation period rot_per 32.3496 h n/a LCDB (Rev. 2020-October); 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

18751 Yualexandrov           Discovered 1999 Apr. 15 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Yurij Vladimirovich Alexandrov (b. 1934) is a professor at the V. N. Karazin Kharkiv National University. A well-regarded teacher, Alexandrov is the author of Physics of Planets, Celestial Mechanics and other textbooks for university students. 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

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Alternate Designations
 1999 GO9 = 1993 TX4 = 1995 BG6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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