(21804) Václavneumann

Asteroid (21804) Václavneumann
Properties of the orbit ( animation ) Epoch: 4th November 2013 ( JD 2,456,600.5)
Orbit type	Main belt asteroid
Major semi-axis	3.9408 AU
eccentricity	0.2673
Perihelion - aphelion	2.8872 AU - 4.9943 AU
Inclination of the orbit plane	3.8357 °
Length of the ascending node	97.9672 °
Sidereal period	7.82 a
Mean orbital velocity	15.01 km / s
Physical Properties
Absolute brightness	14.3 mag
history
Explorer	L. Sarounová
Date of discovery	4th October 1999
Another name	1999 TC ₈
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(21804) Václavneumann is an asteroid of the main outer belt that was discovered on October 4, 1999 by the Czech astronomer L. Sarounová at the Ondřejov observatory ( IAU code 557) on the Manda mountain in Ondřejov u Prahy .

The asteroid belongs to the Hilda group , which means that it moves in an orbital resonance of 3: 2 with the planet Jupiter around the sun . This group is named after the asteroid (153) Hilda .

The asteroid was named on May 26, 2002 after the Czech conductor , violin and viola player Václav Neumann (1920–1995), who was an excellent interpreter of the works of Leoš Janáček , Gustav Mahler and Antonín Dvořák as well as the more recent Czech music ( Josef Suk , Bohuslav Martinů et al.) And in 1962 Leoš Janáček's opera The Excursions of Mr. Brouček first recorded.

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