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11943 Davidhartley (1993 OF9)
Classification: Main-belt Asteroid          SPK-ID: 2011943
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0514343212771181 2.7497e-08  
a 3.013956859964823 1.6122e-08 au
q 2.858936034514018 7.9266e-08 au
i 8.941239110443499 2.7112e-07 deg
node 300.9038378893068 5.4382e-06 deg
peri 301.5624190998319 1.5627e-05 deg
M 130.7271228630468 1.9212e-05 deg
tp 2458506.487685204280
(2019-Jan-22.98768520)
9.8858e-05 TDB
period 1911.190484840723
5.23
1.5335e-05
4.198e-08
d
yr
n .1883642697342133 1.5114e-09 deg/d
Q 3.168977685415628 1.6951e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2482  
   data-arc span      13669 days (37.42 yr)  
   first obs. used      1983-09-11  
   last obs. used      2021-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4258  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 22:52:54  

Additional Information
 Earth MOID = 1.85572 au 
 Jupiter MOID = 1.94832 au 
 T_jup = 3.228 
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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 12.49   n/a E2021B10  
rotation period rot_per 15.674 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.]

11943 Davidhartley           Discovered 1993 July 20 by E. W. Elst at the European Southern Observatory.
David Hartley (1705-1757) was an English physician and philosopher who attempted to explain how thought processes occur. His major work, Observations on Man, His Frame, His Duty and His Expectations, is important in the history of psychology for suggesting that body and mind function in concert.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1993 OF9 = 1983 RQ7 = 1984 WM2 
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