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1216 Askania, provisional designation 1932 BL, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 29 January 1932, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany.[10] It was named after the company Askania Werke, a German manufacturer of precision instruments.[2]
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 29 January 1932 |
| Designations | |
| (1216) Askania | |
Named after | Askania Werke (German manufacturer)[2] |
| 1932 BL · 1952 DH 1984 YY6 · A909 GF | |
| main-belt · (inner) Flora[3][4] · background[5] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.32 yr (40,295 days) |
| Aphelion | 2.6325 AU |
| Perihelion | 1.8328 AU |
| 2.2327 AU | |
| Eccentricity | 0.1791 |
| 3.34 yr (1,219 days) | |
| 134.38° | |
| 0° 17m 43.44s / day | |
| Inclination | 7.5997° |
| 121.60° | |
| 144.64° | |
| Physical characteristics | |
| 7.21±0.38 km[6] 9.62±2.53 km[7] 10.08±0.54 km[8] 10.533±0.089 km[6] | |
| 6.536±0.003 h[9] | |
| 0.064±0.009[6] 0.070±0.008[8] 0.136±0.014[6] 0.15±0.09[7] 0.24 (assumed)[3] | |
| Tholen = S[1] · S[3] B–V = 0.903[1] | |
| 13.49[1][3][6][7][8] | |
Askania orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,219 days). Its orbit has an eccentricity of 0.18 and an inclination of 8° with respect to the ecliptic.[1] The asteroid is a member of the Flora family, one of the largest families in the asteroid belt.[4][a] Conversely, it is considered a background asteroid when applying the hierarchical clustering method to it proper orbital elements.[5]
The body's observation arc begins with its official discovery observation at Heidelberg in 1932. In July 1906, a first precovery was taken at the Lowell Observatory, and in April 1909, the asteroid was first identified at the discovering observatory as A909 GF.[10]
The minor planet was named after "Askania Werke AG", a manufacturer of optical and astronomical instruments in Berlin (also see Cinetheodolite).[1] The company went on to develop the auto pilot of the V-1 bomb in the following years.[11] The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 (H 112).[2]
In the Tholen classification, Askania is a common stony S-type asteroid.[1]
Lightcurves
Lightcurve observations of Askania at the Menke Observatory in July 2006, show a well-defined periodicity of 6.536 hours, during which time the brightness of the body varies by 0.30 magnitude (U=3-).[9]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Askania measures between 7.21 and 10.533 kilometers in diameter and its surface has an albedo between 0.064 and 0.15.[6][7][8]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, an stony asteroid and largest member and namesake of the Flora family – and calculates a diameter of 5.44 kilometers with an absolute magnitude of 13.49.[3][a]
- The Collaborative Asteroid Lightcurve Link groups any asteroid into the Flora family that has a semi-major axis, inclination and eccentricity in the following ranges: 2.15 < a < 2.35; 0.03 < e < 0.23: 1.5 < i < 8. However, modern synthetic clustering models exclude (1216) Askania from the Flora family, see AstDyS-2 and Nesvorny HCM Asteroid Families V3.0.
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