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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1434815081406839 8.9009e-09  
a 2.799003224250434 1.2965e-08 au
q 2.397398020344345 2.2745e-08 au
i 6.637410611190986 5.6919e-07 deg
node 138.0737763486289 6.8819e-06 deg
peri 324.6914600108363 1.5418e-05 deg
M 64.99200183427303 1.0407e-05 deg
tp 2458891.711627721046
(2020-Feb-12.21162772)
4.8989e-05 TDB
period 1710.422988722317
4.68
1.1884e-05
3.254e-08
d
yr
n .2104742524940684 1.4624e-09 deg/d
Q 3.200608428156523 1.4825e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2050  
   data-arc span      11177 days (30.60 yr)  
   first obs. used      1990-08-16  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47531  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:03  

Additional Information
 Earth MOID = 1.41764 au 
 Jupiter MOID = 1.94076 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 13.26   n/a MPCxxxxx  
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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