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Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

1699 Honkasalo - 25.9.2017 at 04.08 - 25.9.2017 at 04.28 Orimattila, Artjärvi, Tähtikallio Observation number 67505

Visibility III / V

1699 Honkasalo (1941 QD, 1931 PE, 1934 KC, 1941 QD, 1944 MB) Filmed on a DS weekend Sunday. Finland 100 project target 24. The asteroid at the inner edge of the main zone 1699 Honkasalo, discovered by Yrjö Väisälä on August 26, 1941 in Iso-Heikkilä, Turku. interference method. The size of the asteroid is 8.34km and the spin time is 11.116h / r. 1Picture. A summary image showing movement during a series.
2Picture. first picture, measured 01: 08: 30UT 04h47m32.5s + 24d21'23.7 "16.0mag, Horizon 01: 08: UT 04h47m32.5s + 24d21'23.1" 16.3mag.
3Picture. last picture, measured 01: 27: 24UT 04h47m33.0s + 24d21'24.9 "16.0mag, Horizon 01: 27UT 04h47'33.0" 16.3mag. For brightness calibration, r.13.6mag star USNO-A 04h50m55s + 25d25'42 "was selected from the star map.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 1699 Honkasalo
    • Keskitaso
  • Seeing
    • Good
Technical information

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

Comments: 1 pcs
Jari Kuula - 21.11.2017 at 21.41 Report this

Honkasalo liittyy Ursaan myös Tähtitieteen Harrastajan Kirjan (1947) kautta. Hän 36-vuotiaana maisterismiehenä piirteli kirjan tähtikartat. Allekirjoittaneella on kyseinen opus hyllyssä T. B:n omistuskirjoituksella varustettuna.

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