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Skywarden,
Ursa Astronomical Association
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taivaanvahti(at)ursa.fi

Ursa Astronomical Association

(15951) 1998 BB2 - 19.3.2021 at 03.20 - 19.3.2021 at 03.41 Orimattila, Artjärvi, Tähtikallio Observation number 97101

Visibility III / V

Kari Laihia, Toni Veikkolainen, Timo Loikala, Porin Karhunvartijat

(15951) 1998 BB2 (1998 BB2.1988 FU2,1991 XV5,1997 WG27) The asteroid on the outer edge of the main zone was photographed during Toni's second March shooting visit.
When photographing the Black Eye Galaxy M64 in Berenike's hair, this came into the picture. The asteroid was discovered by Italian amateur astronomer Luciano Lai Dossobuono at the observatory on January 17, 1998. Luciano Lai (1948) has discovered a total of 13 asteroids and has set up the Dossobuono and Cavriana Observatories, source Wikipedia https://it.wikipedia.org/wiki/Luciano_Lai . The Madonna di Dossobuono Astronomical Observatory (code 560 Madonna di Dossobuono) in the municipality of Verona has telescopes Newton 400mm and Maksutov 250mm. Source Wikipedia
https://it.wikipedia.org/wiki/Osservatorio_astronomico_di_Madonna_di_Dossobuono . The size of the asteroid is 16.32km and the rotation speed is 56.7977h / r. When photographed, the asteroid was at a distance of 2,085au and the closest on March 29, 2021 to 2,073au. Toni and Timo photographed and Kari as an asteroid sensor.
1Picture. First image measured, 2021-03-19T 01: 21: 05UT 2459292.55630JDUT 12h56m18.47s + 21d56'45.8 "16.667mag Std Dev 191.099 SNR38.224 FWHM3.673", JPL Horizon 01: 21: 05UT 12h56m18.47s + 21d56 ' 44.7 "16.810 mag.
2Picture. Last Image Measured, 2021-03-19T 01: 41: 57UT 2459292.57079JDUT 12h56m17.91s + 21d56'52.1 "16.864mag Std Dev 132.492 SNR30.710 FWHM5.119", JPL Horizon 50.8 "16.810 mag.
3Picture. A summary image of a stack, the movement is visible. Asteroid (418858) 2008 WA102 19.7mag, motion shown .No other asteroids below 20.0mag. TYC 1455-1181-1 v.11.29mag stars used to calibrate brightness measurement.


Additional information
  • Observation target
    • Asteroid
  • Name of the observation target
    • (15951) 1998 BB2
    • Keskitaso
  • Seeing
    • Good
Technical information

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

Comments: 1 pcs
Toni Veikkolainen - 25.3.2021 at 23.38 Report this

Kuvausyö oli kokonaisuutena melkoinen menestys. Yksittäisruutuja kertyi pinottaviksi 7 DS-kohteesta ja aaman yön aikana toteutetun Messier-maratonin tuloksena oli 84 kohdetta. Joitakin aamuyöllä nousevia matalalle jääviä Messier-kohteita jäi pilvien taakse.

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