1567 Alikoski

1567 Alikoski
Discovery
Discovered by	Y. Väisälä
Discovery site	Turku Obs.
Discovery date	22 April 1941
Designations
MPC designation	(1567) Alikoski
Named after	Heikki Alikoski (astronomer)
Alternative designations	1941 HN · 1947 HE; 1947 HG · 1948 OC
Minor planet category	main-belt · (outer)
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	78.55 yr (28,691 days)
Aphelion	3.4785 AU
Perihelion	2.9417 AU
Semi-major axis	3.2101 AU
Eccentricity	0.0836
Orbital period (sidereal)	5.75 yr (2,101 days)
Mean anomaly	135.05°
Mean motion	0° 10m 17.04s / day
Inclination	17.279°
Longitude of ascending node	51.454°
Argument of perihelion	110.87°
Physical characteristics
Dimensions	62.36±17.29 km; 67.83±2.1 km (IRAS:12); 67.933±0.584 km; 69.242±0.432 km; 70.06±0.80 km; 77.10±19.58 km
Synodic rotation period	16.405±0.01 h
Geometric albedo	0.04±0.03; 0.05±0.04; 0.059±0.002; 0.0624±0.0160; 0.0626±0.004 (IRAS:12)
Spectral type	PU (Tholen); C (SMASS) · C; B–V = 0.720
Absolute magnitude (H)	9.47

1567 Alikoski, provisional designation 1941 HN, is a rare-type carbonaceous asteroid from the outer region of the asteroid belt, approximately 67 kilometers in diameter. It was discovered on 22 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.^[11] It was later named after Finnish astronomer Heikki Alikoski.^[2]

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1567 Alikoski

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