Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

2020 Ukko - 25.9.2017 at 00.09 - 25.9.2017 at 00.56 Orimattila, Artjärvi, Tähtikallio Observation number 67434

Visibility II / V

2020 Husband (1936 FR, 1952 HA2,1973 FP1). Filmed on a DS weekend on Sunday. Finland 100 target of our project 21.2020 The hub asteroid was discovered by Yrjö Väisälä on March 18, 1936 in Iso-Heikkilä, Turku. The asteroid of Ursa in Turku is currently located in the same place. The asteroid on the outer edge of the main zone has a size of 18.73km and a rotation time of 25.47h / r .1Picture. Stack of the first set, no noticeable movement.
2Picture. The first image of the first series, measured 21: 09: 30UT 23h18m28.9s -11d10'49.3 "15.427mag, Horizon 21: 09UT 23h18m28.98s -11d10'49.1" 15.9mag.
A hardware failure occurred and the stand made a so-called meridian flip, as a result of which the tower dome did not follow suit. So I had to drive it into place manually. In the next series, the image field also turned.
3Picture. Stack of the last set, no noticeable movement.
4Picture. Last image of the last series, measured 21: 56: 22UT 23h18m27.58s -11d11'01.7 "15.701mag, Horizon 21: 56UT 23h18m27.66s -11d11'01.5" 15.9mag .Brightness used for calibration BD-11 6045 v.10.78mag stars.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 2020 Ukko
    • Heikosti näkyvä
  • Seeing
    • Good
Technical information

Alluna RC16, C415 / 3320, SBIG 1001E, filter L, 5 x 120s, 5 x 120s

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