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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

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

Visibility III / V


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.

#Suomi100asteroidit


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 1551 Argelander
    • Keskitaso
  • Seeing
    • Good
Technical information

Alluna RC16, C415 / 3320, SBIG 1001E, filter L, 10 x 120s

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