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14164 Hennigar (1998 TH29)
Classification: Main-belt Asteroid          SPK-ID: 2014164
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.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05611495857751392 3.1665e-08  
a 2.935974129651234 1.2702e-08 au
q 2.771222062981203 9.1309e-08 au
i 1.510178355685467 3.7032e-06 deg
node 354.6875255068125 0.00012923 deg
peri 94.06480847247791 0.00013396 deg
M 133.4275403354065 3.4843e-05 deg
tp 2458715.464512277200
0.00017708 TDB
period 1837.49752835059
n .1959186308800916 1.2714e-09 deg/d
Q 3.100726196321265 1.3414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2087  
   data-arc span      11436 days (31.31 yr)  
   first obs. used      1990-02-24  
   last obs. used      2021-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48428  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 03:26:15  

Additional Information
 Earth MOID = 1.78821 au 
 Jupiter MOID = 2.0064 au 
 T_jup = 3.272 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.18   n/a E2021B10  
diameter diameter 3.975 km 0.666 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.859 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:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2012). Mon. Not. Royal Ast. Soc. 421, 2094-2108.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]
geometric albedo albedo 0.338   0.162 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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

Alternate Designations
 1998 TH29 = 1990 DF2 
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