1576 Fabiola

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1576 Fabiola
001576-asteroid shape model (1576) Fabiola.png
Shape model of Fabiola from its lightcurve
Discovery [1]
Discovered by S. Arend
Discovery site Uccle Obs.
Discovery date30 September 1948
Designations
(1576) Fabiola
Named after
Queen Fabiola of Belgium [2]
1948 SA ·1931 RV
1931 TQ2 ·1933 BZ
1939 CS ·1943 YA
1948 TU1 ·1948 UJ
1950 DZ
main-belt  ·(outer)
Themis [3] [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 85.66 yr (31,288 days)
Aphelion 3.6746 AU
Perihelion 2.6257 AU
3.1501 AU
Eccentricity 0.1665
5.59 yr (2,042 days)
130.30°
0° 10m 34.68s / day
Inclination 0.9514°
166.62°
244.20°
Physical characteristics
Dimensions21.33±8.66 km [5]
23.49±0.43 km [6]
26.22±1.79 km [7]
27.25±1.7 km [8]
27.357±0.240 km [9]
28.6±2.9 km [10]
30±3 km [11]
30.150±0.400 km [12]
6.7 h [13]
0.0746±0.0139 [12]
0.08±0.02 [11] [10]
0.0913±0.013 [8]
0.100±0.015 [7]
0.11±0.09 [5]
0.115±0.015 [9]
0.123±0.018 [6]
Tholen = BU [1] [3]
B–V = 0.632 [1]
U–B = 0.405 [1]
11.04 [1] [3] [6] [7] [8] [10] [11] [12]  ·11.13 [5]  ·11.17±0.17 [14]

    1576 Fabiola, provisional designation 1948 SA, is a Themistian asteroid from the outer regions of the asteroid belt, approximately 27 kilometers in diameter. It was discovered on 30 September 1948, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle. [15] The asteroid was named after Queen Fabiola of Belgium. [2]

    Contents

    Orbit and classification

    Fabiola is a Themistian asteroid that belongs to the Themis family ( 602 ), a very large family of carbonaceous asteroids, named after 24 Themis. [3] [4] [16] It orbits the Sun in the outer main-belt at a distance of 2.6–3.7  AU once every 5 years and 7 months (2,042 days). Its orbit has an eccentricity of 0.17 and an inclination of 1° with respect to the ecliptic. [1]

    The asteroid was first identified as 1931 RV at Simeiz Observatory in September 1931. The body's observation arc begins with its identification as 1931 TQ2 at Lowell Observatory in October 1931, almost 17 years prior to its official discovery observation at Uccle. [15]

    Physical characteristics

    In the Tholen classification, Fabiola has an ambiguous spectral type, similar to the B-type asteroids ("bright" carbonaceous asteroids), yet with an "unusual" spectra (BU). [1]

    Rotation period

    In November 1976, a rotational lightcurve of Fabiola was obtained from photometric observations by Swedish astronomer Claes-Ingvar Lagerkvist at Uppsala Observatory. Lightcurve analysis gave a rotation period of 6.7 hours with a brightness amplitude of 0.2 magnitude ( U=2 ). [13]

    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, Fabiola measures between 21.33 and 30.150 kilometers in diameter and its surface has an albedo between 0.0746 and 0.123. [5] [6] [7] [8] [9] [10] [11] [12]

    The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0913 and a diameter of 27.25 kilometers based on an absolute magnitude of 11.04. [3] [8]

    Naming

    This minor planet was named after Queen Fabiola of Belgium (1928–2014). [2] The official naming citation was published by the Minor Planet Center on 31 January 1962 ( M.P.C. 2116). [17]

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    References

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