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18399 Tentoumushi (1992 WK1)
Classification: Main-belt Asteroid          SPK-ID: 2018399
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2022232859259511 6.9763e-09  
a 3.153786136749798 1.1802e-08 au
q 2.516017141068543 1.9227e-08 au
i 18.29765295188305 2.517e-07 deg
node 75.71438337592751 8.9833e-07 deg
peri 330.0426647820599 6.2239e-06 deg
M 7.928653869822349 4.8729e-06 deg
tp 2459155.444922126056
(2020-Nov-01.94492213)
2.7628e-05 TDB
period 2045.72280502181
5.60
1.1483e-05
3.144e-08
d
yr
n .1759769207813871 9.8778e-10 deg/d
Q 3.791555132431053 1.4188e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2241  
   data-arc span      11241 days (30.78 yr)  
   first obs. used      1990-05-25  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43383  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 01:54:15  

Additional Information
 Earth MOID = 1.54214 au 
 Jupiter MOID = 1.62679 au 
 T_jup = 3.098 
[ 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 12.39   n/a E2021B10  
diameter diameter 22.987 km 0.095 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.048   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

18399 Tentoumushi           Discovered 1992 Nov. 17 by K. Endate and K. Watanabe at Kitami.
The Tentoumushi astronomy club was named after the seven-starred ladybug. The club received an award from the city of Komatsu for its astronomy popularization.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-01-12Last Updated: 2017-01-17

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