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Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

(50734) 2000 EP153 - 2.9.2022 at 22.22 - 2.9.2022 at 23.16 Orimattila, Artjärvi, Tähtikallio Observation number 110873

Visibility I / V

Kari Laihia, Toni Veikkolainen, Porin Karhunvartijat

(50734) 2000 EP153 (2000 EP153) A mid-main belt asteroid imaged on the first evening of the 2022 DS days. When photographing Aquarius NGC 6772 bipolar planetary 12mag nebula, this object came into the picture. A Maria family asteroid was discovered by the NEAT discovery program at the Haleakala (608 – Haleakala-AMOS) observatory on March 6, 2000. The size of the small-sized asteroid is 3.06 km and the rotation speed is 7.972 h/r. Spectral class S according to the family. When photographing, the asteroid was at a distance of 1.5417au and at its closest on July 23, 2022 at 1.369au. Toni photographed the color series and Kari measured L from the images as an asteroid sensor. The Milky Way posed challenges to the measurement, only spot measurements have been successful in some way!

1Fig. first image of series L120s measured, 2022-09-02T 19:22:49UT 2459825.30751JDUT 19h13m53.40s -02d40'14.7" 18.889mag Std Dev 67.839 SNR2.746 FWHM-" ,JPL Horizon 19:22:49UT502d470m - 19h373s '14.2" 18.44mag .

2Fig. last image of the series L120s measured, 2022-09-02T 20:16:09UT 2459825.34454JDUT 19h13m53.45s -02d40'34.2" 15.809mag Std Dev 7315.234 SNR3.012 FWHM1.975" ,JPL Horizon 20:13m53.63m -02d40'34.2" 02d40'35.8" 18.44mag.

3 Picture sum picture L120s 1-11 from a stack of pictures, the movement is weakly visible. Bipolar NGC 6772 planetary nebula v. 12.1mag. Asteroid ((20971) 1981 DR1 18.029mag, movement is visible. No other asteroids below 20.6mag in the picture.

TYC 5133-885-1 v.12.06mag star used for brightness measurement calibration.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (50734) 2000 EP153
  • Seeing
    • Good
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter L, bin3 11 x 120s

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