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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

(31472) 1999 CT36 - 14.3.2020 at 22.37 - 14.3.2020 at 22.56 Orimattila, Artjärvi, Tähtikallio Observation number 89939

Visibility I / V

(31472) 1999 CT36 (1999 CT36,1987 UP3,2000 KL45,2003 HX55) The asteroid at the inner edge of the main zone was imaged on the second night of the March work. When we photographed the comet 155P / Shoemaker 3 it came with the picture. The asteroid was discovered by the LINEAR Socorro exploration program on February 10, 1999. Estimated size 3.6km and rotation time 3.2h / r. When photographing, the asteroid was 1,624au away and the closest was 2/294au on 2/29/2020. 1Picture. first image measured, 2020-03-14 20: 38: 24UT 2458923.36000JDUT 11h11m34.51s + 16d41'07.1 "17.7mag Std Dev 58.914, JPL Horizon 20: 38: 24UT 11h11m34.66s + 16d41'06.8" 18.20mag.
2Picture. last image measured, 20: 57: 12UT 2458923.37305JDUT 11h11m33.66s + 16d41'11.6 "17.8mag. Std Dev 46.597, JPL Horizon 20: 57: 12UT 11h11m33.88s + 16d41'10.9 18.20mag.
3Picture. sum view of the stack, motion is shown. Pictured is comet 155P / Shoemaker 3 T14.61mag. Asteroid (64308) 2001 UJ30 19.32mag, motion shown. (214652) 2006 SR75 20.30mag, motion shown. (426577) 2013 SL22 20.38mag, poorly visible? No others below 20.8mag in the picture. asteroids. TYC 2967-160-1 v.10.78mag stars used to calibrate brightness measurement.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (31472) 1999 CT36
    • Erittäin heikosti näkyvä
  • Seeing
    • Good
Technical information

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

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