1019 Strackea

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1019 Strackea
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date3 March 1924
Designations
(1019) Strackea
Named after
Gustav Stracke [2]
(German astronomer)
1924 QN
main-belt [1]  ·(inner)
Hungaria [3] [4]  · background [5]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 92.08 yr (33,632 days)
Aphelion 2.0477 AU
Perihelion 1.7756 AU
1.9117 AU
Eccentricity 0.0712
2.64 yr (965 days)
316.21°
0° 22m 22.44s / day
Inclination 26.977°
144.42°
121.85°
Physical characteristics
Dimensions7.169±0.263 km [6]
7.44±1.36 km [7]
8.37±0.7 km (IRAS:3) [8]
8.79±0.23 km [9]
3.832 h (incorrect) [10]
4.044±0.002 h [11]
4.04659±0.00006 h [12]
4.047±0.001 h [13]
4.047±0.005 h [14]
4.05±0.01 h [12]
4.052±0.002 h [15]
0.206±0.012 [9]
0.2236±0.040(IRAS:3) [8]
0.305±0.029 [6]
0.39±0.13 [7]
Tholen = S [1] [3]
B–V = 0.953 [1]
U–B = 0.513 [1]
12.63 [1] [3] [6] [7] [8] [9]

    1019 Strackea, provisional designation 1924 QN, is a stony Hungaria asteroid of the inner asteroid belt, approximately 8 kilometers in diameter. It was discovered on 3 March 1924, by astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. [16] It is named for German astronomer Gustav Stracke. [2]

    Contents

    Classification and orbit

    Strackea is a member of the Hungaria group, a dynamical group forming the innermost dense concentration of asteroids in the Solar System. [4] It is, however, a non-family asteroid of the background population, and not a member of the (collisional) Hungaria family. [5] It orbits the Sun at a distance of 1.8–2.0  AU once every 2 years and 8 months (965 days). Its orbit has an eccentricity of 0.07 and an inclination of 27° with respect to the ecliptic. [1] The body's observation arc begins with its official discovery observation at Heidelberg in 1924. [16]

    Physical characteristics

    In the Tholen classification, Strackea is a common, stony S-type asteroid. [1] [3]

    Lightcurve

    The first valid rotational lightcurve of Strackea with a period of 4.05 hours and a brightness variation of 0.17 magnitude was obtained by French amateur astronomer Laurent Bernasconi in February 2006 ( U=2 ). [12] Since then, several well-defined lightcurves with a period between 4.044 and 4.052 hours and an amplitude of 0.15 to 0.25 magnitude were obtained by astronomers Brian Warner, [lower-alpha 1] Richard Schmidt, as well as by the group of astronomers Pierre Antonini, Raoul Behrend, Roberto Crippa and Federico Manzini ( U=3/3-/3-/3/3 ). [11] [12] [13] [14] [15]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Strackea measures between 7.169 and 8.79 kilometers in diameter and its surface has an albedo between 0.206 and 0.39. [6] [7] [8] [9] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2236 and a diameter of 8.37 kilometers with an absolute magnitude of 12.63. [3]

    Naming

    This minor planet was named after German astronomer Gustav Stracke (1887–1943), who was in charge of the minor planet department at the Berlin-based Astronomical Calculation Institute, despite his wish that he not be honored in this fashion. [2] Previously, the discoverer had circumvented Stracke's wish by accordingly naming a consecutively numbered sequence of asteroids, so that their first letters form the name "G. Stracke". These minor planets, in the number range from 1227 to 1234, were: [17]

    Naming citation was first published by Paul Herget in The Names of the Minor Planets in 1955 ( H 97 ). [2]

    Notes

    1. Lightcurve plot of (1019) Strackea, Warner (2014) Palmer Divide Station. Summary figures at Center for Solar System Studies

    Related Research Articles

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    References

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