1551 Argelander, Orimattila, Artjärvi, Tähtikallio

1551 Argelander (1938 DC1,1930 BL, 1940 XD, 1951 XG1,1953 GD1,1957 KR, 1962 XP) Filmed on a DS weekend Sunday. Finland The target of our 100 projects 19. 1551 was discovered by Yrjö Wäisälä on February 24, 1938 in Iso-Heikkilä, Turku. The asteroid was named after the astronomer Friedrich Wilhelm August Argelander, a Finnish-Lithuanian (Prussian) astronomer whose father was a Finnish clergyman of Argillander. The asteroid at the inner edge of the main zone has a size of 10.23km and rotates at 4.061h / r (may also be 30% incorrect) as it travels its orbit, which lasts 3.71 years. 1Picture. Aggregate stack, asteroid motion not visible.
2Picture. First image, measured 18: 37: 34UT 21h09m48.1s -20d44'27.6 "15.52mag, Horizon 18: 37UT 21h09m48.12s -20d44'28.4" 15.72mag.
3Picture. Last picture, measured 18: 56: 29UT 21h09m48.08s -20d44'27.5 "15.676mag, Horizon 18: 56UT 21h09m48.08s -20d44'28.2" 15.72mag .Brightness used for calibration BD-201420 v.10.73mag stars.

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1551 Argelander - 24.9.2017 at 21.37 - 24.9.2017 at 21.56 Orimattila, Artjärvi, Tähtikallio Observation number 67423