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Heikki A. Alikoski (1912, in Oulu – 28 December 1997, in Turku) was a Finnish astronomer and discoverer of minor planets.
From 1937 to 1956, he was an observatory assistant under Yrjö Väisälä at Turku Observatory, where he discovered 12 asteroids. Alikoski later helped establish the Turku Astronomical–Optical Institute.
The outer main-belt asteroid 1567 Alikoski, discovered by Yrjö Väisälä in 1941, was named in his honour.
| 1508 Kemi | 21 October 1938 | ||
| 1512 Oulu | 18 March 1939 | ||
| 1697 Koskenniemi | 8 September 1940 | ||
| 1715 Salli | 9 April 1938 | ||
| 1786 Raahe | 9 October 1948 | ||
| 2180 Marjaleena | 8 September 1940 | ||
| 2257 Kaarina | 18 August 1939 |
| 2487 Juhani | 8 September 1940 | ||
| 2573 Hannu Olavi | 10 March 1953 | ||
| 2714 Matti | 5 April 1938 | ||
| 2911 Miahelena | 8 April 1938 | ||
| 3776 Vartiovuori | 5 April 1938 | ||
| 4066 Haapavesi | 7 September 1940 |