1567 Alikoski

1567 Alikoski
Discovery [1]
Discovered by Y. Väisälä
Discovery site Turku Observatory
Discovery date 22 April 1941
Designations
MPC designation 1567 Alikoski
Named after
 Heikki Alikoski (astronomer)[2]
1941 HN · 1947 HE
1947 HG · 1948 OC
main-belt (outer)
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 77.51 yr (28309 days)
Aphelion 3.4793 AU (520.50 Gm)
Perihelion 2.9410 AU (439.97 Gm)
3.2101 AU (480.22 Gm)
Eccentricity 0.083851
5.75 yr (2100.8 d)
66.445°
0° 10m 16.896s / day
Inclination 17.279°
51.456°
110.90°
Earth MOID 1.99476 AU (298.412 Gm)
Jupiter MOID 1.62664 AU (243.342 Gm)
Jupiter Tisserand parameter 3.116
Physical characteristics
Dimensions 67.83±2.1 km (IRAS:12)[3]
70.06±0.80 km[4]
67.933±0.584 km[5]
Mean radius
 33.915 ± 1.05 km
16.405 h (0.6835 d)[1][6]
0.0626 ± 0.004 (IRAS:12)[1][3]
0.059±0.002[4]
0.0624±0.0160[5]
B–V = 0.720
PU (Tholen), C (SMASS)
C [7]
9.47 (IRAS: 12)[1]

    1567 Alikoski, provisional designation 1941 HN, is a large, carbonaceous asteroid from the outer region of the asteroid belt, about 68 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory, southwest Finland, on 22 April 1941.[8]

    The dark C-type asteroid is also classified as a subtype of the very rare P-type asteroids in the Tholen taxonomic scheme. It orbits the Sun at a distance of 2.9–3.5 AU once every 5 years and 9 months (2,104 days). Its orbit is tilted by 17 degrees to the plane of the ecliptic and shows an eccentricity of 0.08. The body takes about 16.4 hours to rotate once around its axis,[6] and has an albedo of 0.06, according to the surveys carried out by the Infrared Astronomical Satellite, IRAS, the Japanese Akari satellite, and the NEOWISE mission of the Wide-field Infrared Survey Explorer.[3][4][5]

    The minor planet was named in honor of Finnish astronomer Heikki Alikoski (1912–1997), assistant to the discoverer from 1937 to 1956, and himself an observer and discoverer of minor planets. He also helped greatly in establishing the Turku Astronomical-Optical Institute.[2]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 1567 Alikoski (1941 HN)" (2015-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 26 April 2016.
    2. 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1567) Alikoski. Springer Berlin Heidelberg. p. 124. ISBN 978-3-540-29925-7. Retrieved December 2015.
    3. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved December 2015.
    4. 1 2 3 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. Retrieved December 2015.
    5. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015.
    6. 1 2 Stephens, Robert D. (September 2004). "Photometry of 966 Muschi, 1567 Alikoski, and 2331 Parvulesco". The Minor Planet Bulletin 31 (3): 60–61. Bibcode:2004MPBu...31...60S. ISSN 1052-8091. Retrieved December 2015.
    7. ↑ "LCDB Data for (1567) Alikoski". Asteroid Lightcurve Database (LCDB). Retrieved December 2015.
    8. ↑ "1567 Alikoski (1941 HN)". Minor Planet Center. Retrieved December 2015.

    External links


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