1336 Zeelandia

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1336 Zeelandia
001336-asteroid shape model (1336) Zeelandia.png
Shape model of Zeelandia from its lightcurve
Discovery [1]
Discovered by H. van Gent
Discovery site Johannesburg Obs.
Discovery date9 September 1934
Designations
(1336) Zeelandia
Named after
Zeeland [2]
(a province of the Netherlands)
1934 RW ·1929 QE
1930 XC ·1935 YF
1939 RP ·A906 YO
main-belt  ·(outer)
Koronis [3] [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 112.01 yr (40,913 days)
Aphelion 3.0348 AU
Perihelion 2.6654 AU
2.8501 AU
Eccentricity 0.0648
4.81 yr (1,757 days)
117.20°
0° 12m 17.28s / day
Inclination 3.1972°
97.420°
220.01°
Physical characteristics
Dimensions19.18±0.51 km [5]
20.99±2.1 km [3] [6]
21.441±0.132 km [7]
23.056±0.108 km [8]
23.63±3.31 km [9]
15.602 h [10]
15.624±0.001 h [11]
0.153±0.280 [9]
0.1829±0.0228 [8]
0.2183±0.052 [3] [6]
0.232±0.045 [7]
0.273±0.017 [5]
B–V = 0.810 [1]
U–B = 0.366 [1]
Tholen = S [1]
SMASS = S [1] [3]
10.66 [1] [3] [5] [6] [8]  ·10.71±0.58 [12]  ·10.79 [9]  ·10.94±0.02 [10]

    1336 Zeelandia, provisional designation 1934 RW, is a stony Koronian asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 9 September 1934, by Dutch astronomer Hendrik van Gent at the Union Observatory in Johannesburg, South Africa. [13] The asteroid was named for the Dutch province of Zeeland. [2]

    Contents

    Orbit and classification

    Zeelandia belongs to the Koronis family ( 605 ), [3] [4] a very large asteroid family of 6,000 known members with stony composition and nearly co-planar ecliptical orbits. [14]

    It orbits the Sun in the outer main-belt at a distance of 2.7–3.0  AU once every 4 years and 10 months (1,757 days; semi-major axis of 2.85 AU). Its orbit has an eccentricity of 0.06 and an inclination of 3° with respect to the ecliptic. [1] In October 1905, a first precovery was taken at the Lowell Observatory in Arizona. Its first identification as A906 YO was made at Taunton Observatory ( 803 ) in December 1906. The body's observation arc begins with its official discovery observation at Johannesburg in September 1934. [13]

    Physical characteristics

    Zeelandia has been characterized as a stony S-type asteroid in both the Tholen and SMASS classification. [1]

    Rotation period

    In March 2004, a rotational lightcurve of Zeelandia was obtained from photometric observations by a collaboration of American astronomers. Lightcurve analysis gave a well-defined rotation period of 15.602 hours with a brightness variation of 0.61 magnitude ( U=3 ). [10] The result was confirmed by photometrists Pierre Antonini, Federico Manzini, Julian Oey and Frederick Pilcher, as well as Hiromi and Hiroko Hamanowa, who measured a similar period of 15.624 with an amplitude of 0.50 magnitude in April 2005 ( U=3 ). [11]

    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, Zeelandia measures between 19.18 and 23.63 kilometers in diameter and its surface has an albedo between 0.153 and 0.273. [5] [6] [7] [8] [9]

    The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2183 and a diameter of 20.99 kilometers based on an absolute magnitude of 10.66. [3] [6]

    Naming

    This minor planet was named for the Dutch province of Zeeland. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 121 ). [2]

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    References

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