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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

(523823) 2015 BG311 - 24.9.2022 at 22.29 - 24.9.2022 at 22.35 Orimattila, Artjärvi, Tähtikallio Observation number 110901

Visibility I / V

(523823) 2015 BG311 (2015 BG311) The asteroid Cupid NEO was imaged on the second night of the 2022 September talcos. The asteroid was discovered by the Haleakala observatory of the Pan-STARRS research program (F51 – Pan-STARRS 1, Haleakala) on November 29, 2014. The estimated size is approx. 740m. At the time of imaging, the asteroid was at a distance of 0.1936au and at its closest on October 15, 2022 at 0.16792au.

1Fig. first image of the series L15s measured, 2022-09-24T 19:29:02UT 2459847.31182JDUT 20h11m37.75s +12d06'19.2" 16.647mag Std Dev 37.255 SNR7.859 FWHM5.576" ,JPL Horizon 20:11:331mUT 20h11m37.75s +37h 12d06'18.6" 16.876mag .

2Fig. last image of series L15s measured, 2022-09-24T 19:34:45UT 2459847.31579JDUT 20h11m38.55s +12d06'22.4" 16.726mag Std Dev 30.827 SNR6.391 FWHM2.508" , JPL Horizon 19:34:41m38.55s +38h 12d06'21.9" 16.876mag .

3 Picture sum picture L15s 1-11 from a stack of pictures, movement is visible. There are no other asteroids below 20.8 mag in the picture.

TYC 1081-1247-1 v.12.21mag star used for brightness measurement calibration.

Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (523823) 2015 BG311
  • Seeing
    • Good
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter L, bin3 11 x 15s

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