1478 Vihuri
Main-belt asteroid From Wikipedia, the free encyclopedia
1478 Vihuri, provisional designation 1938 CF, is a stony asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 6 February 1938, by Finnish Yrjö Väisälä at Turku Observatory in Southwest Finland.[8] The asteroid was named after a Finnish philanthropist by the name of A. Vihuri.[2]
| Discovery[1] | |
|---|---|
| Discovered by | Y. Väisälä |
| Discovery site | Turku Obs. |
| Discovery date | 6 February 1938 |
| Designations | |
| (1478) Vihuri | |
Named after | A. Vihuri (philanthropist)[2] |
| 1938 CF · 1934 CG | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.54 yr (40,374 days) |
| Aphelion | 2.6885 AU |
| Perihelion | 2.2439 AU |
| 2.4662 AU | |
| Eccentricity | 0.0901 |
| 3.87 yr (1,415 days) | |
| 216.50° | |
| 0° 15m 16.2s / day | |
| Inclination | 7.8326° |
| 318.57° | |
| 161.04° | |
| Physical characteristics | |
| Dimensions | 8.45 km (derived)[3] 9.52±1.30 km[4] 11.19±0.79 km[5] |
| 19.5 h[6] | |
| 0.126±0.068[4] 0.127±0.019[5] 0.20 (assumed)[3] | |
| S[3] B–V = 0.840[1] U–B = 0.570[1] | |
| 12.44±0.44[7] · 12.63[1][5] · 12.73[3][6] · 12.97[4] | |
Orbit and classification
Vihuri orbits the Sun in the inner main-belt at a distance of 2.2–2.7 AU once every 3 years and 10 months (1,415 days). Its orbit has an eccentricity of 0.09 and an inclination of 8° with respect to the ecliptic.0[1] The asteroid's observation arc begins 11 days prior to its official discovery observation. A precovery taken at Lowell Observatory in 1906, as well as identification 1934 CG made at Uccle in 1934, remained unused.[8]
Physical characteristics
Rotation period
In December 1983, a rotational lightcurve was obtained form photometric observations by American astronomer Richard P. Binzel. Analysis of the provisional lightcurve gave a rotation period of 19.5 hours with a brightness variation of 0.23 magnitude (U=1).[6] As of 2017, no additional lightcurves of Vihuri have been obtained.[3]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Vihuri measures 9.52 and 11.19 kilometers in diameter, and its surface has an albedo of 0.126 and 0.127, respectively.[4][5] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony S-type asteroid of 0.20 and calculates a diameter of 8.45 kilometers with an absolute magnitude of 12.73.[3]
Naming
This minor planet was named for Finnish philanthropist A. Vihuri, a ship owner and supporter of science and arts.[2] The official naming citation was published by the Minor Planet Center on 15 July 1968 (M.P.C. 2882).[9]
References
External links
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