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18365 Shimomoto (1990 WN5)
Classification: Main-belt Asteroid          SPK-ID: 2018365
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04380968107905583 1.5798e-08  
a 3.016472116543607 1.4914e-08 au
q 2.884321435133967 4.6447e-08 au
i 11.15348456485709 3.2907e-07 deg
node 57.4891160073394 3.2078e-06 deg
peri 175.1197985102845 1.9585e-05 deg
M 78.86773279731952 2.0383e-05 deg
tp 2458781.277816889890
(2019-Oct-24.77781689)
0.00010795 TDB
period 1913.583420833024
5.24
1.4192e-05
3.886e-08
d
yr
n .1881287202223378 1.3952e-09 deg/d
Q 3.148622797953248 1.5567e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2477  
   data-arc span      10998 days (30.11 yr)  
   first obs. used      1990-10-16  
   last obs. used      2020-11-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44262  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:27:38  

Additional Information
 Earth MOID = 1.87169 au 
 Jupiter MOID = 1.84001 au 
 T_jup = 3.218 
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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 12.0   n/a MPO474009  
diameter diameter 15.400 km 0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.125   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

18365 Shimomoto           Discovered 1990 Nov. 17 by T. Seki at Geisei.
Shigeo Shimomoto (b. 1963) is a Japanese amateur astronomer and computer programer. He is the administrator of Comet hunter Seki's webpage. He actively observes comets in Tosa, Kochi prefecture, and encourages the public to learn more about astronomy through his own website.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050407/MPCPages.arcLast Updated: 2005-04-15

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Alternate Designations
 1990 WN5 = 1972 FF = 1990 UJ7 = 1993 HO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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