Discovered by Y. Väisälä MPC designation 1928 Summa Minor planet category main-belt Absolute magnitude 12.68 Discoverer Yrjö Väisälä Asteroid group Asteroid belt | Discovery date 21 September 1938 Alternative names 1938 SO · 1969 PA Discovered 21 September 1938 Orbits Sun Discovery site Iso-Heikkilä Observatory | |
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1928 Summa, provisional designation 1938 SO, is a main-belt asteroid discovered on September 21, 1938, by Y. Väisälä at Turku Observatory. Its light curve was measured by Richard Binzel and shows a period of 7004246776400000000♠6.8549±0.0006 h and amplitude of 6999180000000000000♠0.18±0.01 mag.
The asteroid is named after the village on the Karelian Isthmus, where the Battle of Summa took place during the Finnish Winter War (1939–1940).
References
1928 Summa Wikipedia(Text) CC BY-SA