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JPL Small-Body Database Browser
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18665 Sheenahayes (1998 FK49)
Classification: Main-belt Asteroid          SPK-ID: 2018665
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1202546720391519 4.2695e-08  
a 2.615447632370989 1.1438e-08 au
q 2.300927835104639 1.1042e-07 au
i 2.23173965887234 4.5215e-06 deg
node 197.8927294276998 9.9194e-05 deg
peri 351.1834802499237 0.00010042 deg
M 350.7631267191007 1.5702e-05 deg
tp 2458640.140575870090
(2019-Jun-05.64057587)
6.744e-05 TDB
period 1544.96081945198
4.23
1.0135e-05
2.775e-08
d
yr
n .2330156179156034 1.5285e-09 deg/d
Q 2.929967429637338 1.2813e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1477  
   data-arc span      9133 days (25.00 yr)  
   first obs. used      1994-05-09  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52089  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:37:27  

Additional Information
 Earth MOID = 1.30185 au 
 Jupiter MOID = 2.02902 au 
 T_jup = 3.396 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO337416  
diameter diameter 3.913 km 0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.318   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18665 Sheenahayes           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sheena Marie Hayes (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for her biochemistry project. She attends the Eastern High School, Pekin, Indiana, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040830/MPCPages.arcLast Updated: 2004-09-06

Alternate Designations
 1998 FK49 = 1994 JN9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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