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Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

(7335) 1989 JA - 22.4.2022 at 23.35 - 22.4.2022 at 23.57 Orimattila, Artjärvi, Tähtikallio Observation number 106674

Visibility III / V

(7335) 1989 AND (1989 JA) The asteroid Apollo NEO / PHA was photographed on the first night of the April 2022 work. The asteroid was discovered by Eleanor Francis "Glo" at the Helin Palomar Observatory (code 675) on May 1, 1989. The total estimate for the asteroid is 1.8km (NEOWISE 0.932 ± 0.153 km) and the rotation estimate is 12h / r (Arecibo and Goldstone), estimate spectral class S. Source Wikipedia https: // . When photographed, the asteroid was at a distance of 0.2815au and the nearest May 27, 2022 0.027 au.

1Picture. first image in the series1 L120s measured, 2022-04-22T 20: 35: 35UT 2459692.35804JDUT 15h25m31.77s + 14d48'08.8 "16.352mag Std Dev 432.904 SNR48.808 FWHM3.278", JPL Horizon 20: 35: 35UT 15h25m31.76s + 14d48'08.5 "16.532 mag.

2Picture. last image in the series11 L120s measured, 2022-04-22T 20: 56: 27UT 2459692.37253JDUT 15h25m31.58s + 14d48'11.7 "16.703mag Std Dev 192.242 SNR29.337 FWHM5.095", JPL Horizon 20: 56: 27UT 15h25m31.60s + 14d48'11.5 "16.532 mag.

3Picture summary image of the L120s 1-11 image stack, motion is displayed. No other asteroids under 21.7 mag are shown.

TYC 939-90-1 used to calibrate brightness measurement

v.11.47mag stars.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (7335) 1989 JA
  • Seeing
    • Average
Technical information

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

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