1419 Danzig

Classification and orbit

When applying the synthetic hierarchical clustering method (HCM) by Nesvorný, Danzig is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main-belt. 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 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 (). The city was also honored by another minor planet, . Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 128)

Physical characteristics

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

Rotation period and pole

In November 1988, Polish astronomer Wiesław Wiśniewski obtained a rotational lightcurve of Danzig from photometric observations. It gave a well-defined rotation period of hours with a brightness variation of 0.92 magnitude (). In October 2002, another lightcurve obtained by Italian and French amateur astronomers Silvano Casulli and Laurent Bernasconi gave a concurring period of hours and an amplitude of 0.81 magnitude (). 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 hours, as well as a spin axis of (22.0°, 76.0°) in ecliptic coordinates (λ, β) ().

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.

References

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