717 Wisibada

717 Wisibada (prov. designation: A911 QK or 1911 MJ) is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 26 August 1911, by German astronomer Franz Kaiser at the Heidelberg-Königstuhl State Observatory in southwest Germany.[1] The D-type asteroid measures approximately 29 kilometers (18 miles) in diameter with no rotation period yet determined. It was named after the discoverer's birthplace, the city of Wiesbaden in Hesse, Germany.[2]

717 Wisibada
Discovery [1]
Discovered byF. Kaiser
Discovery siteHeidelberg Obs.
Discovery date26 August 1911
Designations
(717) Wisibada
Pronunciation/vɪzɪˈbeɪdə/
Named after
Wiesbaden [2]
(German city)
A911 QK · 1911 MJ
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc108.68 yr (39,695 d)
Aphelion3.9650 AU
Perihelion2.3124 AU
3.1387 AU
Eccentricity0.2633
5.56 yr (2,031 d)
150.82°
0° 10m 37.92s / day
Inclination1.6463°
343.55°
24.403°
Physical characteristics
Mean diameter
  • 27.294±0.444 km[7]
  • 31.04±4.7 km[8]
  • 32.52±0.37 km[9]
n.a.[3][5][10][11]
  • 0.061±0.002[9]
  • 0.0666±0.026[8]
  • 0.086±0.009[7]
  • Tholen = DX: [3]
  • B–V = 0.701±0.061[3]
  • U–B = 0.242±0.073[3]

    Orbit and classification

    Wisibada is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5][6] It orbits the Sun in the outer asteroid belt at a distance of 2.3–4.0 AU once every 5 years and 7 months (2,031 days; semi-major axis of 3.14 AU). Its orbit has an eccentricity of 0.26 and an inclination of 2° with respect to the ecliptic.[3] The body's observation arc begins at Vienna Observatory on 22 August 1922, or one year after its official discovery observation at the Heidelberg Observatory.[1]

    Naming

    This minor planet was named by the discoverer Franz Kaiser after his birthplace, the city of Wiesbaden in Hesse, Germany. Kaiser also named asteroid 765 Mattiaca after Wiesbaden using the city's Latin name, Aquae Mattiacorum, which means "Waters of the Mattiaci". The naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 72).[2]

    Physical characteristics

    In the Tholen classification, Wisibada's spectral type is closest to a dark D-type asteroid, and somewhat similar to an X-type asteroid, though with a noisy spectrum (DX:).[3]

    Rotation period

    As of 2020, no rotational lightcurve of Wisibada has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[3][5][10][11]

    Diameter and albedo

    According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Wisibada measures (27.294±0.444 km), (31.04±4.7 km) and (32.52±0.37 km) kilometers in diameter and its surface has an albedo of (0.086±0.009), (0.0666±0.026) and (0.061±0.002), respectively.[7][8][9] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0796 and a diameter of 31.12 kilometers based on an absolute magnitude of 10.9.[10] Alternative mean-diameters published by the WISE team include (27.656±0.202 km) and (28.670±0.332 km) with a corresponding albedo of (0.086±0.009) and (0.0783±0.0134).[5][10]

    gollark: You're just *assuming* that.
    gollark: I have an infinitely long list of things which aren't normal distributions.
    gollark: Not EVERYTHING is a normal distribution.
    gollark: What?
    gollark: No. But *you* might not want to have your beliefs messed with weirdly.

    References
    1. "717 Wisibada (A911 QK)". Minor Planet Center. Retrieved 16 June 2020.
    2. Schmadel, Lutz D. (2007). "(717) Wisibada". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 69. doi:10.1007/978-3-540-29925-7_718. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 717 Wisibada (A911 QK)" (2020-04-28 last obs.). Jet Propulsion Laboratory. Retrieved 16 June 2020.
    4. "Asteroid 717 Wisibada – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 16 June 2020.
    5. "Asteroid 717 Wisibada". Small Bodies Data Ferret. Retrieved 16 June 2020.
    6. Zappalà, V.; Bendjoya, Ph.; Cellino, A.; Farinella, P.; Froeschle, C. (1997). "Asteroid Dynamical Families". NASA Planetary Data System: EAR-A-5-DDR-FAMILY-V4.1. Retrieved 16 June 2020.} (PDS main page)
    7. Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M. Retrieved 16 June 2020.
    8. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 16 June 2020.
    9. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 16 June 2020. (online, AcuA catalog p. 153)
    10. "LCDB Data for (717) Wisibada". Asteroid Lightcurve Database (LCDB). Retrieved 16 June 2020.
    11. Behrend, Raoul. "Asteroids and comets rotation curves". Geneva Observatory. Retrieved 15 June 2020.
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