• Source: 9903 Leonhardt

9903 Leonhardt, provisional designation 1997 NA1, is a dark asteroid from the outer region of the asteroid belt, approximately 10 kilometers in diameter.
The asteroid was discovered on 4 July 1997, by American amateur astronomer Paul Comba at Prescott Observatory in Arizona, United States. It was named after Dutch keyboard player Gustav Leonhardt.




Orbit and classification


Leonhardt orbits the Sun in the outer main-belt at a distance of 2.4–3.8 AU once every 5 years and 5 months (1,982 days). Its orbit has an eccentricity of 0.24 and an inclination of 2° with respect to the ecliptic.
It was first identified as 1976 UG6 at Kiso Observatory in 1976, extending the body's observation arc by 21 years prior to its official discovery observation at Prescott.




Physical characteristics






= Diameter and albedo

=
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Leonhardt measures 17.8 and 8.499 kilometers in diameter, respectively. WISE/NEOWISE also gives an albedo of 0.042 for the body's surface. It has an absolute magnitude of 14.5.




= Lightcurves

=
As of 2017, the asteroid's rotation period and shape remain unknown.




Naming


This minor planet was named for Gustav Leonhardt (1928–2012), a Dutch conductor and harpsichordist, who founded the Leonhardt Baroque Ensemble. He was known for his many international concert tours and for his large number of recorded baroque works. The official naming citation was published by the Minor Planet Center on 2 April 1999 (M.P.C. 34356).
The main-belt asteroid 12637 Gustavleonhardt, discovered during the second Palomar–Leiden Trojan survey campaign in 1973, is also named in his honor.




References






External links


Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
9903 Leonhardt at AstDyS-2, Asteroids—Dynamic Site
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
9903 Leonhardt at the JPL Small-Body Database

Kata Kunci Pencarian:

• 9903 Leonhardt
• Gustav Leonhardt
• Meanings of minor-planet names: 9001–10000
• List of minor planets: 9001–10000
• Paul G. Comba
• List of named minor planets: L
• List of named minor planets: 9000–9999
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