Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
14164 Hennigar (1998 TH29)
Classification: Main-belt Asteroid          SPK-ID: 2014164
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05604470255828117 3.2893e-08  
a 2.937245050254964 1.3924e-08 au
q 2.772628025072641 9.6652e-08 au
i 1.510045555838335 3.9447e-06 deg
node 354.6874791163401 0.00014242 deg
peri 94.51386631509651 0.00014799 deg
M 55.42093314636627 3.8432e-05 deg
tp 2458717.439003698331
(2019-Aug-21.93900370)
0.00019637 TDB
period 1838.690777715317
5.03
1.3075e-05
3.58e-08
d
yr
n .1957914861830772 1.3922e-09 deg/d
Q 3.101862075437287 1.4705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1808  
   data-arc span      11062 days (30.29 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49288  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:41:42  

Additional Information
 Earth MOID = 1.78963 au 
 Jupiter MOID = 2.00496 au 
 T_jup = 3.271 
[ 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 14.1   n/a MPO337378  
diameter diameter 3.975 km 0.666 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.859 h n/a LCDB (Rev. 2019-August); 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Nov-28 17:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin