| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 5 September 1924 |
| Designations | |
| (1153) Wallenbergia | |
Named after | Georg Wallenberg[2][a] (German mathematician) |
| 1924 SL · 1930 HH | |
| main-belt · (inner) · Flora[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.02 yr (31,784 days) |
| Aphelion | 2.5489AU |
| Perihelion | 1.8428 AU |
| 2.1958 AU | |
| Eccentricity | 0.1608 |
| 3.25yr (1,189 days) | |
| 237.52° | |
| 0° 18m 10.44s / day | |
| Inclination | 3.3345° |
| 280.54° | |
| 28.766° | |
| Physical characteristics | |
| Dimensions | 8.02±1.81 km[4] 8.037±0.357 km[5] 9.36 km(derived)[3] |
| 4.096±0.002h[6] 4.116±0.0055 h[7] 4.12±0.070 h[8] | |
| 0.24(assumed)[3] 0.37±0.14[4] 0.433±0.091[5] | |
| S[3][9] | |
| 11.985±0.002(R)[7] · 12.00[5] · 12.040±0.100(R)[8] · 12.1[1] · 12.28[4] · 12.31±0.08[3][6][10] · 12.49±0.22[9] | |
1153 Wallenbergia, provisional designation1924 SL, is a stony Florianasteroid from the inner regions of theasteroid belt, approximately 8 kilometers in diameter. It was discovered on 5 September 1924, by Soviet astronomerSergey Belyavsky at theSimeiz Observatory on the Crimean peninsula.[11] The asteroid was named after German mathematicianGeorg Wallenberg.[2]
Wallenbergia is a member of theFlora family (402), a giantasteroid family and the largest family of stony asteroids in the main-belt.[3] It orbits the Sun in theinner main-belt at a distance of 1.8–2.5 AU once every 3 years and 3 months (1,189 days). Its orbit has aneccentricity of 0.16 and aninclination of 3° with respect to theecliptic.[1]
The body'sobservation arc begins with its identification as1930 HH atJohannesburg Observatory in April 1930, almost six years after its official discovery observation at Simeiz.[11]
Wallenbergia has been characterized as a stonyS-type asteroid byPanSTARRS photometric survey.[9]
In September 1989, the first rotationallightcurve ofWallenbergia was obtained from photometric observations by Polish astronomerWiesław Z. Wiśniewski atUniversity of Arizona. Lightcurve analysis gave a well-definedrotation period of 4.096 hours with a brightness amplitude of 0.33magnitude (U=3).[6] Observations in the R-band at thePalomar Transient Factory in 2014, gave a period of 4.116 and 4.12 hours with an amplitude of 0.25 and 0.23 magnitude, respectively (U=2/2).[7][8]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Wallenbergia measures 8.02 and 8.037 kilometers in diameter and its surface has analbedo of 0.37 and 0.433, respectively.[4][5]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – taken from8 Flora, the parent body of the Flora family – and derives a diameter of 9.36 kilometers based on anabsolute magnitude of 12.31.[3]
Thisminor planet was named after German mathematician Georg Wallenberg (1864–1924). The official naming citation was mentioned inThe Names of the Minor Planets byPaul Herget in 1955 (H 107).[2][a]
