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Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

5066 Garradd - 5.12.2021 at 05.11 - 5.12.2021 at 05.30 Orimattila, Artjärvi, Tähtikallio Observation number 103277

Visibility III / V


5066 Garradd (1990 MA) A Mars-crossing asteroid was photographed on the second night of the December work. When photographing 50yrs. at a distance from the Big Bear Milky Way-sized spiral galaxy NGC 3675, this came into the picture. The asteroid was discovered by Robert H McNaught at the Siding Springs Observatory on June 22, 1990. The asteroid is named after Gordon John Garradd, an Australian amateur astronomer. Gordon Garradd has found a total of 16 comets and 31 asteroids. He lives outside the electricity grid and uses solar as well as wind power. Garrad has built several telescopes himself. Source Wikipedia https://en.wikipedia.org/wiki/Gordon_J._Garradd . The total estimate is 4.5km. As of imaging, the asteroid was 1,755au away, closest to 1.39au on February 17, 2022.

1Picture. The first image in the series1 L120s measured 43d32'40.9 "18.197 mag.

2Picture. last image in the series11 L120s measured, 2021-12-05UT 03: 31: 03UT 2459553.64656JDUT 11h26m42.08s + 43d32'55.4 "18.057mag Std Dev 76.775 SNR12.345 FWHM4.548", JPL Horizon 03: 31: 03UT 11h26m41.94s + 43d32'54.1 "18.197 mag.

3Picture summary image of the L120s 1-11 stack of images, fast motion is displayed. No other asteroids below 24.0 mag are shown. TYC 3015-439-1 v. 11.62mag stars used to calibrate brightness measurement.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 5066 Garradd
  • Seeing
    • Good
Technical information

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

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