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] | |
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]
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]
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]
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]
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]