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18381 Massenet (1991 YU)
Classification: Main-belt Asteroid          SPK-ID: 2018381
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435232019878112 3.0867e-08  
a 2.799462547787341 1.385e-08 au
q 2.397674719083946 8.7957e-08 au
i 6.637120147762316 4.2503e-06 deg
node 138.0731928136115 3.6181e-05 deg
peri 324.7618659999769 4.0423e-05 deg
M 22.8408106283811 1.7181e-05 deg
tp 2458891.952598401704
(2020-Feb-12.45259840)
8.1573e-05 TDB
period 1710.844033128614
4.68
1.2697e-05
3.476e-08
d
yr
n .2104224540805566 1.5616e-09 deg/d
Q 3.201250376490737 1.5838e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1848  
   data-arc span      10842 days (29.68 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47894  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:48:38  

Additional Information
 Earth MOID = 1.41805 au 
 Jupiter MOID = 1.94016 au 
 T_jup = 3.301 
[ 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 13.2   n/a MPO416905  
diameter diameter 8.758 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.145   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

18381 Massenet           Discovered 1991 Dec. 30 by E. W. Elst at Haute Provence.
Jules Massenet (1842-1912) was a prolific French composer of operas. His greatest successes were Manon (1884), Werther (1892) and Thaïs (1894). The Méditation, a violin solo with orchestra from Thaïs, became world famous. In 1878 he was elected a member of the Académie des Beaux-Arts.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100726/MPCPages.arcLast Updated: 2010-07-28

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Alternate Designations
 1991 YU = 1990 QB11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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