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Ursa Astronomical Association

4543 Phoinix - 7.8.2021 at 02.21 - 7.8.2021 at 02.32 Orimattila, Artjärvi, Tähtikallio Observation number 100692

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4543 Phoinix (1989 CQ1.1930 DN, 1977 AP1) The asteroid L4 (Greeks) of Jupiter was photographed on the first night of the August 2021 work. The asteroid was discovered by American astronomer Carolyn Jean Spellmann at the Shoemaker Palomar Observatory on February 2, 1989. Carolyn Shoemaker has found a total of more than 500 asteroids and 32 comets, she started as an astronomer only at the age of 51. Source Wikipedia . The asteroid is named after the Greek mythology Amyntor, the son of the king Phoenix. Phoenix adopted Achilles after many intrigues and was also in a Trojan war with Achilles. Source Wikipedia The size of the asteroid is 63.83km and the rotation speed is 38.866h / r. Spectral class assumed C, carbonaceous. When photographed, the asteroid was at a distance of 4,949au and the closest on December 1, 2021 to 3,709au.
1Picture. first image in the series1 L60s measured, 2021-08-06UT 23: 21: 14UT 2459433.47307JDUT 04h17m33.14s + 35d19'24.0 "17.63mag Std Dev 61.064 SNR4.384 FWHM-", JPL Horizon 23: 21: 14UT 04h17m33.02s + 35d19 '23 .2 "17,353 mag.
2Picture. last image in the series11 L60s measured, 2021-08-06UT 23: 32: 11UT 2459433.48068JDUT 04h17m33.39s + 35d19'25.5 "17.304mag Std Dev 100.0541 SNR5.779 FWHM4.589", JPL Horizon 23: 32: 11UT 04h17m33.39s + 35d19'25.1 "17,353 mag.
3Picture sum view of L60s 1-11 stack of images, motion not displayed. No other asteroids less than 21.2mag in the image. TYC 2379-1113-1 v.11.1mag stars used to calibrate brightness measurement.

Additional information
  • Observation target
    • Asteroid
  • Seeing
    • Average
  • Name of the observation target
    • 4543 Phoinix
Technical information

Alluna RC16, C415 / 3320, Moravian G4-16000EC MkII, filter L, bin3 11 x 60s

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