Contact information

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

Ursa Astronomical Association

(879) Ricarda - 14.8.2022 at 22.38 - 14.8.2022 at 22.49 Orimattila, Artjärvi, Tähtikallio Observation number 109755

Visibility IV / V

Kari Laihia, Porin Karhunvartijat

(879) Ricarda (1917 CJ,A1917 OB,1929 ND,1933 OR,1937 NX,1949 MU,1957 MC) A central main belt asteroid imaged during the third evening of the 2022 August talcos. The Maria family asteroid was discovered by the German astronomer Maximilian Franz Joseph Cornelius Wolf at the Heidelberg (024 Heidelberg-Konigstuhl) observatory on July 22, 1917. The asteroid got its name from the German historian Ricarda Huch (1864 –1947). Ricarda Huch has written several history books on European history and a large amount of other literature. Source Wikipedia https://en.wikipedia.org/wiki/Ricarda_Huch . The size of the asteroid is 18.31 km and the rotation speed is a slow 82.9 h/r. There is a 3D model https://3d-asteroids.space/asteroids/879-Ricarda . When photographed, the asteroid was at a distance of 1.3662au and at its closest on September 27, 2022 at 1.188au.

1Fig. first image of the series L30s measured, 2022-08-14T 19:38:18UT 2459806.31826JDUT 23h58m04.39s +23d15'21.3" 14.05mag Std Dev 630.859 SNR32.418 FWHM6.960" ,JPL Horizon 19:38:58UT 23h58m04.39s +43d15'21.3" 23d15'20.9" 14.428mag .

2Fig. last image of the series L30s measured, 2022-08-13T 19:49:12UT 2459806.32583JDUT 23h58m04.37s +23d15'24.8" 14.0210mag Std Dev 647.623 SNR44.257 FWHM10.178" ,JPL Horizon 19:49:158m +04.29h458UT 23d15'24.8" 14.428mag .

3 Image sum image L30s 1-20 from a stack of images, movement is not visible. There are no others under 20.3 mag in the picture. asteroids.

TYC 2252-2125-1 v.11.82 stars used for brightness measurement calibration.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (879) Ricarda
  • Seeing
    • Mediocre
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter L, bin3 20 x 30s

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