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JPL Small-Body Database Browser
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13436 Enid (1999 WF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2013436
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.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1160812828131825 3.2476e-08  
a 3.213273500416912 1.606e-08 au
q 2.840272590458911 1.0306e-07 au
i .8875098850283195 4.7089e-06 deg
node 185.4398837651316 0.00023141 deg
peri 300.1610006369202 0.00023236 deg
M 82.85097768203413 2.0026e-05 deg
tp 2458116.310795174013
0.00011701 TDB
period 2103.875157711667
n .1711128146936071 1.2829e-09 deg/d
Q 3.586274410374913 1.7925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2125  
   data-arc span      17380 days (47.58 yr)  
   first obs. used      1972-01-17  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47287  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:15:01  

Additional Information
 Earth MOID = 1.85615 au 
 Jupiter MOID = 1.47592 au 
 T_jup = 3.180 
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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 12.6   n/a MPO449043  
diameter diameter 15.740 km 0.195 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.67828 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.078   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

13436 Enid           Discovered 1999 Nov. 17 by T. Stafford at the Zeno Observatory.
Enid, a city in northern Oklahoma, was founded on 1893 Sept. 16 in the Cherokee Outlet land run. It lies on the Chisholm Trail, a major route of cattle drives from Texas to Kansas in the late 1800s.
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
 1999 WF = 1972 BL = 1981 SN4 = 1989 CW8 = 1996 HB24 = 1998 QY48 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2019-Dec-12 09:01 UT
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