1478 Vihuri

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1478 Vihuri
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Obs.
Discovery date6 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]

    Contents

    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

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 1478 Vihuri (1938 CF)" (2017-07-05 last obs.). Jet Propulsion Laboratory. Archived from the original on 18 September 2020. Retrieved 25 July 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1478) Vihuri". Dictionary of Minor Planet Names – (1478) Vihuri. Springer Berlin Heidelberg. p. 118. doi:10.1007/978-3-540-29925-7_1479. ISBN   978-3-540-00238-3.
    3. 1 2 3 4 5 6 7 "LCDB Data for (1478) Vihuri". Asteroid Lightcurve Database (LCDB). Retrieved 16 December 2016.
    4. 1 2 3 4 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv: 1209.5794 . Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8 . Retrieved 16 December 2016.
    5. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    6. 1 2 3 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus. 72 (1): 135–208. Bibcode:1987Icar...72..135B. doi:10.1016/0019-1035(87)90125-4. ISSN   0019-1035 . Retrieved 16 December 2016.
    7. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007 . Retrieved 16 December 2016.
    8. 1 2 "1478 Vihuri (1938 CF)". Minor Planet Center. Retrieved 16 December 2016.
    9. ↑ Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN   978-3-642-01964-7.
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