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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .121692878890475 3.7624e-08  
a 2.616477595350365 1.0829e-08 au
q 2.298070904219752 9.5739e-08 au
i 2.232208859354989 3.7453e-06 deg
node 197.7509174267265 9.7317e-05 deg
peri 351.4588591920888 9.8472e-05 deg
M 130.2534625380947 1.5396e-05 deg
tp 2458641.179504763268
(2019-Jun-06.67950476)
6.5342e-05 TDB
period 1545.873517384106
4.23
9.5967e-06
2.627e-08
d
yr
n .2328780433532391 1.4457e-09 deg/d
Q 2.934884286480978 1.2146e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1736  
   data-arc span      9680 days (26.50 yr)  
   first obs. used      1994-05-09  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:34:30  

Additional Information
 Earth MOID = 1.29796 au 
 Jupiter MOID = 2.02175 au 
 T_jup = 3.395 
[ 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 14.17   n/a E2021B10  
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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