Английская Википедия:1419 Danzig

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1419 Danzig (prov. designation: Шаблон:Mp) is a highly elongated Flora asteroid from the inner regions of the asteroid belt. It was discovered on 5 September 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The stony S-type asteroid has a rotation period of 8.1 hours and measures approximately Шаблон:Convert in diameter. It was named for the city of Gdańsk (Шаблон:Lang-de).

Classification and orbit

When applying the synthetic hierarchical clustering method (HCM) by Nesvorný, Danzig is a member of the Flora family (Шаблон:Small), a giant asteroid family and the largest family of stony asteroids in the main-belt.Шаблон:Rp However, according to the 1995 HCM-analysis by Zappalà, and HCM-analysis by Milani and Knežević (AstDys), it is a background asteroid. The latter HCM-analysis does not recognize the Flora asteroid clan.

Danzig orbits the Sun at a distance of 2.0–2.6 AU once every 3 years and 6 months (1,268 days). Its orbit has an eccentricity of 0.15 and an inclination of 6° with respect to the ecliptic. In 1917, it was first observed as Шаблон:Mp at Simeiz Observatory (and Heidelberg on the following night), extending the body's observation arc by 12 years prior to its official discovery observation at Heidelberg.

Naming

This minor planet was named after the now Polish city and port on the Baltic sea, Gdańsk (Шаблон:Lang-de). The city was also honored by another minor planet, Шаблон:Mp. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small)

Physical characteristics

The overall spectral type for Florian asteroid is that of a stony S-type.Шаблон:Rp

Rotation period and pole

Файл:1419Danzig (Lightcurve Inversion).png

Lightcurve-based 3D-model of Danzig

In November 1988, Polish astronomer Wiesław Wiśniewski obtained a rotational lightcurve of Danzig from photometric observations. It gave a well-defined rotation period of Шаблон:Val hours with a brightness variation of 0.92 magnitude (Шаблон:Small). In October 2002, another lightcurve obtained by Italian and French amateur astronomers Silvano Casulli and Laurent Bernasconi gave a concurring period of Шаблон:Val hours and an amplitude of 0.81 magnitude (Шаблон:Small). While Danzig has an average rotation period, it has a high brightness variation, which indicates that the body has a non-spheroidal shape. In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a period Шаблон:Val hours, as well as a spin axis of (22.0°, 76.0°) in ecliptic coordinates (λ, β) (Шаблон:Small).

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Danzig measures 14.059 and 15.09 kilometers in diameter and its surface has an albedo between 0.238 and 0.260. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-data, that is, an albedo of 0.2324 and a diameter of 14.139 kilometers with an absolute magnitude of 11.45.

External links

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Шаблон:AstDys
• Шаблон:JPL small body