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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

(52768) 1998 OR2 - 14.3.2020 at 21.24 - 14.3.2020 at 21.52 Orimattila, Artjärvi, Tähtikallio Observation number 89610

Visibility IV / V

(52768) 1998 OR2 (1998 OR2) The Amor NEO PHA Mars-crossing asteroid was photographed on the second night of the March work. The potentially earth-threatening asteroid was discovered by the NEAT prospecting halo at the Haleakala Observatory on July 24, 1998. Amor 1998 The OR2 asteroid is the largest of the Earth-threatening PHA asteroids. We also photographed this asteroid the night before. The size of the asteroid is estimated at 2-4km and the rotational speed is 4.1120h / r, the spectral type estimated at LS, strongly reddish? When filming the asteroid was 0.209au away, the closest it will be 0.042au on April 29, 2020. Making observations when the asteroid is at its brightest at about 11.11mag 28-29.4 is perhaps possible during ingestion at dusk at altitudes below 10d? 1Picture. first image measured, 2020-03-14 19: 24: 35UT 2458923.30873JDUT 07h43m44.72s + 42d39'29.4 "13.7mag Std Dev 3846.002, JPL Horizon 19: 24: 35UT 07h43m44.72s + 42d39'29.4" 14.64mag.
2Picture. last image measured, 19: 51: 56UT 2458923.32773JDUT 07h43m44.15s + 42d39'20.0 "13.9mag. Std Dev 3222.198, JPL Horizon 19: 51: 56UT 07h43m44.17s + 42d39'20.0 14.64mag.
3Picture. sum view of the stack, motion is shown. No others below 21.8mag 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
    • (52768) 1998 OR2
    • Näyttävä
  • Seeing
    • Good
Technical information

Alluna RC16, C415 / 3320, SBIG 1001E, filter L, 13 x 120s

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