• Source: 1503 Kuopio

1503 Kuopio, provisional designation 1938 XD, is a stony Eunomian asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 15 December 1938, by astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland. The asteroid was named for the Finnish town of Kuopio.




Orbit and classification


Kuopio is a member of the Eunomia family (502), a prominent family of stony S-type asteroid and the largest one in the intermediate main belt with more than 5,000 members.: 23  It orbits the Sun at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,553 days). Its orbit has an eccentricity of 0.10 and an inclination of 12° with respect to the ecliptic.
The body's observation arc begins with its first identification as 1935 EF at Yerkes Observatory in March 1935, more than 3 years prior to its official discovery observation at Turku.




Physical characteristics






= Rotation period

=
Several rotational lightcurves of Kuopio were obtained from photometric observations since 2001. Analysis of these lightcurves gave a rotation period between 9.577 and 9.98 hours with a brightness variation of 0.01 to 0.05 magnitude (U=3/3/2/2/3).




= Poles

=
In 2011 and 2013, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources was published. In both studies, the modeled lightcurve gave a concurring period 9.9586 hours. The 2013-publication also determined two spin axis of (170.0°, −86.0°) and (27.0°, −61.0°) in ecliptic coordinates (λ, β) (U=n.a.).




= Diameter and albedo

=
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Kuopio measures between 18.43 and 22.99 kilometers in diameter and its surface has an albedo between 0.223 and 0.399.
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.3243 and a diameter of 18.54 kilometers based on an absolute magnitude of 10.5.




Naming


This minor planet was named after the town of Kuopio in central Finland. The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3928).




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 (1)-(5000) – Minor Planet Center
1503 Kuopio at AstDyS-2, Asteroids—Dynamic Site
Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1503 Kuopio at the JPL Small-Body Database

Kata Kunci Pencarian:

• Daftar planet minor yang dinamai berdasarkan nama tempat
• 1503 Kuopio
• Meanings of minor-planet names: 1001–2000
• List of minor planets: 1001–2000
• Yrjö Väisälä
• List of minor planets named after places
• 1504 Lappeenranta
• List of named minor planets: 1000–1999
• List of named minor planets: K
• November 17
• Saint Nicholas