_Danzig.png) Modelled shape ofDanzig from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 5 September 1929 |
| Designations | |
| (1419) Danzig | |
Named after | German name of the Polish city ofGdańsk[2] |
| 1929 RF · 1936 RD 1952 HJ4 · 1957 WO1 A917 GA | |
| Orbital characteristics[3] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 99.90 yr (36,489 days) |
| Aphelion | 2.6285AU |
| Perihelion | 1.9570 AU |
| 2.2927 AU | |
| Eccentricity | 0.1465 |
| 3.47yr (1,268 days) | |
| 356.63° | |
| 0° 17m 2.04s / day | |
| Inclination | 5.7254° |
| 213.53° | |
| 232.65° | |
| Physical characteristics | |
| 14.059±0.096 km[7] 14.139 km[8] 14.997±0.382 km[9] 15.09±0.22 km[10] | |
| (22.0°, 76.0°) (λ1/β1)[13] | |
| 0.2324[14][8] 0.2388±0.0462[7] 0.250±0.009[10] 0.260±0.023[9] | |
| S(family-based)[14] | |
| 11.20[9] · 11.3[3][10] · 11.45±0.14[14][8][11] · 11.45[7] · 11.55±1.00[15] | |
1419 Danzig (prov. designation:1929 RF) is a highly elongatedFlora asteroid from the inner regions of theasteroid belt. It was discovered on 5 September 1929, by German astronomerKarl Reinmuth atHeidelberg Observatory in southwest Germany.[1] The stonyS-type asteroid has arotation period of 8.1 hours and measures approximately 14 kilometers (8.7 miles) in diameter. It was named for the city ofGdańsk (German:Danzig).[2]
When applying the synthetichierarchical clustering method (HCM) byNesvorný,[4]Danzig is a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[16]: 23 However, according to the 1995 HCM-analysis byZappalà,[6] and HCM-analysis byMilani andKnežević (AstDys), it is abackground asteroid. The latter HCM-analysis does not recognize the Floraasteroid clan.[5]
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 aneccentricity of 0.15 and aninclination of 6° with respect to theecliptic.[3] In 1917, it was first observed asA917 GA atSimeiz Observatory (and Heidelberg on the following night), extending the body'sobservation arc by 12 years prior to its official discovery observation at Heidelberg.[1]
Thisminor planet was named after the now Polish city and port on the Baltic sea,Gdańsk (German:Danzig). The city was also honored by another minor planet,764 Gedania.[2] Naming citation was first mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 128)[2]
The overallspectral type for Florian asteroid is that of a stonyS-type.[16]: 23
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In November 1988, Polish astronomerWiesław Wiśniewski obtained a rotationallightcurve ofDanzig from photometric observations. It gave a well-definedrotation period of8.0±0.1 hours with a brightness variation of 0.92magnitude (U=3).[11] In October 2002, another lightcurve obtained by Italian and French amateur astronomersSilvano Casulli andLaurent Bernasconi gave a concurring period of8.1202±0.0001 hours and an amplitude of 0.81 magnitude (U=3).[12] WhileDanzig 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 period8.11957±0.00005 hours, as well as aspin axis of (22.0°, 76.0°) inecliptic coordinates (λ, β) (U=n.a.).[13]
According to the surveys carried out by the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Danzig measures 14.059 and 15.09 kilometers in diameter and its surface has analbedo between 0.238 and 0.260.[7][9][10] TheCollaborative Asteroid Lightcurve Link adoptsPetr Pravec's revised WISE-data, that is, an albedo of 0.2324 and a diameter of 14.139 kilometers with anabsolute magnitude of 11.45.[14][8]
