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14164 Hennigar (1998 TH29)
Classification: Main-belt Asteroid          SPK-ID: 2014164
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0561789716858619 4.9575e-08  
a 2.936356710469535 2.3863e-08 au
q 2.771395209972476 1.4596e-07 au
i 1.510587559959893 5.9187e-06 deg
node 354.715395033581 0.00021095 deg
peri 95.52954308942681 0.00021999 deg
M 140.2387477854413 5.9034e-05 deg
tp 2456884.559104601929
0.0003017 JED
period 1837.856700900052
n .1958803424792028 2.3879e-09 deg/d
Q 3.101318210966593 2.5204e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1115  
   data-arc span      9545 days (26.13 yr)  
   first obs. used      1990-02-24  
   last obs. used      2016-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49643  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:18:29  

Additional Information
 Earth MOID = 1.78681 au 
 Jupiter MOID = 2.00871 au 
 T_jup = 3.272 
[ 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 14.1 mag n/a MPO337378  
rotation period rot_per 11.8588 h n/a LCDB (Rev. 2016-February); 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:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2011). MNRAS 421, 2094-2108.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

14164 Hennigar           Discovered 1998 Oct. 15 by Spacewatch at Kitt Peak.
Donald M. Hennigar (1887-1951) was an amateur telescope maker and active member of the Royal Astronomical Society of Canada, London Centre. He served as vice president of the London Centre during 1936-1938. He was staff architect with the London Life Insurance Company.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

[ show close-approach data ]
Alternate Designations
 1998 TH29 = 1990 DF2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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