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Ursa Astronomical Association
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Ursa Astronomical Association

694 Ekard - 18.6.2022 at 00.58 - 18.6.2022 at 01.05 Orimattila, Artjärvi, Tähtikallio Observation number 107443

Visibility III / V

Kari Laihia, Toni Veikkolainen, Tomi Taskinen, Porin Karhunvartijat

694 Ekard (A909 VC,1909 JA,1951 CD1) a central main belt asteroid imaged on the first evening of the 2022 June talcos. The asteroid was discovered by the American astronomer Joel Hastings Metcalf at the Taunton Observatory on November 7, 1909. Dr. astronomer priest Metcalf has discovered a total of 41 asteroids and comets 23P/Brorsen-Metcalf and 97P/Metcalf-Brewington. The asteroid got its name from Drake University, whose name is translated. Drake University was founded in 1881 by George T. Carpenter, a teacher and pastor, and Francis Marion Drake, a Union general during the Civil War. Drake was originally affiliated with the Christian church (Disciples of Christ), Source Wikipedia . The size of the asteroid is 121.89km and the rotation speed is 5.925h/r. Spectral class spec_T=>CP. There is a 3D model . The photograph was taken from a light summer sky 4 days after the summer solstice with an R (red) filter with an exposure time of 6s. When photographing, the asteroid was at a distance of 1.1503 au and at its closest on July 17, 2022 at 1.063 au.

1Fig. first 1 image of series R6s measured, 2022-06-17T 21:58:16UT 2459748.41546JDUT 18h58m17.37s -01d03'27.2" 11.718mag Std Dev 285.756 SNR11.815 FWHM2.832" ,JPL Horizon 21:58.35m 16m16UT -01d03'27.1" 11.922mag .

2Fig. the last measurable 39 image of the series R6s measured, 2022-06-17T 22:04:46UT 2459748.41997JDUT 18h58m17.18s -01d03'24.7" 12.182mag Std Dev 152.427 SNR4.836 FWHM3.901" ,JPL Horizon 22:58m17.18s -01d03'24.7hUUUU 16s -01d03'24.0" 11.922magmag .

3 Image sum image R6s 1-40 from a stack of images, movement is not visible. There are no other asteroids below 20.0 mag in the picture.

TYC 5115-642-1 v.10.68mag star used for brightness measurement calibration.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 694 Ekard
  • Seeing
    • Bad
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter R,bin3 40 x 6s

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