Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

(99266) 2001 OQ69 - 18.3.2021 at 21.34 - 18.3.2021 at 21.55 Orimattila, Artjärvi, Tähtikallio Observation number 97167

Visibility III / V

Kari Laihia, Toni Veikkolainen, Timo Loikala, Porin Karhunvartijat

(99266) 2001 OQ69 (2001 OQ69,2000 AZ235,2000 CZ112) The asteroid on the inner edge of the main zone was imaged during Ton's second March imaging visit. When describing the Lion galaxy pair NGC3226 / NGC3227, this came into the picture. The asteroid was discovered by Lowell's exploration program at LONEOS Anderson Mesa Observatory on July 19, 2001. Size estimate 2.5km. When photographed, the asteroid was 1,199au at a distance and closest on March 5, 2021 to 1,178au.
Toni and Timo photographed both Kari as an asteroid sensor. The gradient of the sum image (Moon?) Was so large on different sides of the image that we had to make exceptionally 2 sum images that were stretched differently!
1Picture. First image measured, 2021-03-18T 19: 35: 30UT 2459292.31631JDUT 10h23m35.99s + 19d40'29.5 "18.532mag Std Dev 62.114 SNR8.329 FWHM12.509", JPL Horizon 19: 35: 30UT 10h23m36.02s + 19d40 ' 28.5 "18.199mag.
2Picture. Last image measured, 2021-03-18T 19: 56: 24UT 2459292.33083JDUT 10h23m35.35s + 19d40'32.5 "18.406mag Std Dev 75.469 SNR8.654 FWHM3.793", JPL Horizon 19: 56: 24T 10h23m35.32s + 19d40 ' 32.5 "18.199mag.
3Picture. Sum view of the stack stretched to the right, movement is visible. Asteroid (32366) 2000 QA142 16.6mag, motion shown. Asteroid (35983) 1999 NG5 18.4mag, motion shown.
4Picture. Sum view of the stack stretched along the left edge, movement is visible. Asteroid (127611) 2003 BB38 19.6mag, motion shown. No other asteroids below 20.0mag. TYC 1423-40-1 v.12.14mag stars used to calibrate the brightness measurement.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (99266) 2001 OQ69
    • Keskitaso
  • Seeing
    • Good
Technical information

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

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