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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

2019 OR1 - 18.11.2022 at 20.36 - 18.11.2022 at 20.42 Orimattila, Artjärvi, Tähtikallio Observation number 111330

Visibility III / V

Kari Laihia, Toni Veikkolainen, Juha Blad, Porin Karhunvartijat

2019 OR1 (2019 OR1) Aten NEO/PHA asteroid imaged on the first night of the 2022 November talcos. The asteroid was discovered by the PANSTARRS discovery program at the Pan-STARRS 1 Haleakala Observatory (F51 – Pan-STARRS 1, Haleakala) on July 27, 2019. Estimated size 0.164 - 0.366km. When photographed, the asteroid was at a distance of 0.04959au and at its closest on November 21, 2022 at 0.04625au. This asteroid has unusually bad predictions in our measurements, the dec deviates by more than 2" ! The planets Earth and Venus apparently interfere with the orbit .

1Fig. first image of the series L15s measured, 2022-11-18T 18:36:15UT 2459902.27517JDUT 23h42m27.79s +19d32'02.4" 16.441mag Std Dev 36.120 SNR8.983 FWHM4.747" ,JPL Horizon 18:36:49m27.79s +27h8s 19d32'04.5" 16.491mag .

2Fig. last image of the series L15s measured, 2022-11-18T 18:42:13UT 2459902.27931JDUT 23h42m23.26s +19d30'13.0" 16.429mag Std Dev 38.346 SNR8.851 FWHM6.239" , JPL Horizon 18:42:42m23.26s +23h38 19d30'16.0" 16.491mag .

3Fig. sum picture L15s 1-20 from a stack of pictures, very fast movement is visible. Asteroid (71745) 2000 QG180 19.496mag, motion not visible. No other asteroids below 21.2mag.

TYC 1724-1159-1 v.12.22mag star used for brightness measurement calibration.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 2019 OR1
  • Seeing
    • Good
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter L, bin3 20 x 15s

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