| Discovery[1] | |
|---|---|
| Discovered by | F. Kaiser |
| Discovery site | Heidelberg Obs. |
| Discovery date | 26 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 arc | 108.68yr (39,695 d) |
| Aphelion | 3.9650AU |
| Perihelion | 2.3124 AU |
| 3.1387 AU | |
| Eccentricity | 0.2633 |
| 5.56 yr (2,031 d) | |
| 150.82° | |
| 0° 10m 37.92s / day | |
| Inclination | 1.6463° |
| 343.55° | |
| 24.403° | |
| Physical characteristics | |
| 1250h | |
717 Wisibada (prov. designation:A911 QKor1911 MJ) is a darkbackground asteroid from the outer regions of theasteroid belt. It was discovered on 26 August 1911, by German astronomerFranz Kaiser at theHeidelberg-Königstuhl State Observatory in southwest Germany.[1] It was named after the discoverer's birthplace, the city ofWiesbaden in Hesse, Germany.[2]
Wisibada is a non-family asteroid of the main belt'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5][6] It orbits the Sun in theouter 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 aneccentricity of 0.26 and aninclination of 2° with respect to theecliptic.[3] The body'sobservation arc begins atVienna Observatory on 22 August 1922, or one year after its official discovery observation at theHeidelberg Observatory.[1]
Thisminor planet was named by the discovererFranz Kaiser after his birthplace, the city ofWiesbaden in Hesse, Germany. Kaiser also named asteroid765 Mattiaca after Wiesbaden using the city's Latin name,Aquae Mattiacorum, which means "Waters of theMattiaci". Thenaming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 72).[2]
In theTholen classification,Wisibada'sspectral type is closest to a darkD-type asteroid, and somewhat similar to anX-type asteroid, though with a noisy spectrum (DX:).[3]
This object rotates with a period of 1250 hours, making it aslow rotator.[10] This is one of the slowest rotatingminor planets known to exist, and was formerly one of the lowest-numbered minor planets with an undeterminedrotation period.
According to the surveys carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer (WISE), the Infrared Astronomical SatelliteIRAS, and the JapaneseAkari 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 analbedo of (0.086±0.009), (0.0666±0.026) and (0.061±0.002), respectively.[7][8][9] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0796 and a diameter of 31.12 kilometers based on anabsolute 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]
