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387 Aquitania - 18.6.2022 at 00.44 - 18.6.2022 at 00.51 Orimattila, Artjärvi, Tähtikallio Observation number 107393

Visibility III / V

Kari Laihia, Toni Veikkolainen, Tomi Taskinen, Porin Karhunvartijat

387 The asteroid in the central zone of the main zone of Aquitaine (A894 EC, 1894 AZ, 1945 NA, 1948 BG, 1953 EO1) was photographed on the first night of the June 2022 work. The asteroid of the Postrema family was discovered by the French Fernand Courty (1862 -1921) at the Bordeaux Observatory on March 5, 1894, Fernand Courty, who served as assistant astronomer at the Bordeaux Observatory, has found a total of 2 asteroids. Source Wikipedia https://en.wikipedia.org/wiki/Fernand_Courty . The Bordeaux Observatory has been in operation since 1879-2016 and includes several historic telescopes. Source Wikipedia https://en.wikipedia.org/wiki/Bordeaux_Observatory . The asteroid takes its name from the area of Aquitaine (Latin name) in southwestern France, which borders the Pine Mountains and the Spanish border. Source Wikipedia https://en.wikipedia.org/wiki/Aquitaine .The size of the asteroid is 100.5km and the rotation speed is 24.144. There is a 3D model https://3d-asteroids.space/asteroids/387-Aquitania . The image was taken from the light summer sky 4 days after the summer solstice with an R (red) filter at 6s exposure time, a measurement of 3x6s stacks. When photographed, the asteroid was at a distance of 1.1388au and the nearest July 1, 2022 to 1.12au.

1Picture. the first stack of 1-3 images in the series R3x6s measured, 2022-06-17T 21:44: 17UT 2459748.40575JDUT 18h20m22.29s -02d15'23.8 "10.051mag Std Dev 8554.300 SNR82.680FWHM2.927", JPL Horizon 21: 44: 17UT 18h20m22. 29s -02d15'24.4 "10.187 mag.

2Picture. the last 40 images in the series measured, 2022-06-17T 21: 50: 48UT 2459748.41027JDUT 18h20m22.07s -02d15'25.5 "10.078mag Std Dev 2541.623 SNR92.294 FWHM3.440", JPL Horizon 21: 50: 48UT 18h20m22.07s - 02d15'26.5 "10.187 core.

3Picture sum view of R6s 1-40 stack of images, motion not displayed. No other asteroids under 19.3 mag are shown.

HD 168365 v.10.15mag stars used to calibrate the brightness measurement.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • 387 Aquitania
  • Seeing
    • Bad
Technical information

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

Comments: 2 pcs
Emma Bruus - 28.6.2022 at 19.54 Report this

Näemmä aika ääriolosuhteissa irtoaa vielå suht himmeitä kohteita. Vaikuttavaa

Toni Veikkolainen - 28.6.2022 at 19.59 Report this

Tähtikallion Alluna-kaukoputkella kuvauskausi on jatkunut vuoden ympäri jo monien vuosien ajan. Sininen ja vihreä suodatin keräisivät aivan liikaa taustataivaan valoa ja näin ollen ei ymmärrettävistä syistä voi luminanssiakaan käyttää. Niinpä ainoaksi vaihtoehdoksi jää punainen suodin. Kesäkohteiksi olemme valinneet lähes pelkästään asteroideja, koska niistä kirkkaimmat saa pistemäisinä kohteina esiin hyvinkin vaalealta taivaalta. Flättikalibrointi tosin ei kokemuksemme perusteella silloin onnistu kunnolla.

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