Skywarden

Contact information

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

Ursa Astronomical Association

(137725) 1999 XY111 - 21.10.2017 at 21.00 - 21.10.2017 at 21.19 Orimattila, Artjärvi, Tähtikallio Observation number 68467

Visibility I / V

Kari Laihia, Hannu Määttänen, Veikko Mäkelä, Christos Oscar Kambiselis, Olli-Pekka Joronen, Porin Karhunvartijat

137725 (1999 XY111) Filmed on the second night of the October work. The description was made for the purpose of describing Finland 100 asteroids 1446 Sillanpää, 4 other asteroids were obtained. The main zone asteroid 137725 was found in the Linear Exploration Program at the Sorocco Observatory in New Mexico on December 7, 1999. 1Picture. first picture, measured 18: 59: 59UT 01h29m12.02s + 10d46'24.3 "18.2mag, Horizon 19: 00UT 01h29m12.07s + 10d46'23.1" 18.61mag.
2Picture. last picture, measured 19: 18: 51UT 01h29m11.15s + 10d46'19.0 "18.4mag, Horizon 19: 19UT 01h29m11.34s + 10d46'19.0" 18.61 mag.
Brightness calibration used for TYC 617-185-1 v.11.42mag stars.
Summary image with marked stack asteroids http://www.taivaanvahti.fi/images/uploads/201711/67983_a559c12f0fe4d64c08948ebe5ddac26b.jpg .


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (137725) 1999 XY111
    • Erittäin heikosti näkyvä
  • Seeing
    • Good
Technical information

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

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