UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-24 11:47
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Conference: Bucharest University Faculty of Physics 2021 Meeting


Section: Atmosphere and Earth Science; Environment Protection


Title:
The fragmentation of comet C/2019 Y4 (ATLAS)


Authors:
Adrian SONKA (1,2), Mirel BIRLAN (3,1), Alin NEDELCU (1,3)


*
Affiliation:
1) Astronomical Institute of Romanian Academy Str. Cutitul de Argint 5, 040557 Bucharest, Romania

2) Faculty of Physics, University of Bucharest 405 Atomistilor, 077125 Magurele, Ilfov, Romania

3) IMCCE, Observatoire de Paris 77 av Denfert Rochereau, 75014 Paris Cedex, Franc


E-mail
sonka@astro.ro


Keywords:
comets, photometry, lightcurve


Abstract:
Using the remotely controlled telescope from Berthelot Observatory (MPC L54) we detected and monitored unusual cometary activity of long period comet C/2019 Y4 (ATLAS), involving the breakup of the nucleus of the long period comet C/2019 Y4 (ATLAS). We observed three fragmentation events of the nucleus of comet C/2019 Y4 (ATLAS) and we determined that speeds separation between 35 and 70 m/s, speeds in good agreement with Hui and Ye (2020). We also found that at the last fragmentation, the new fragment had older dust emission that the old one (Frag. B). We also studied the lightcurve the comet and concluded that it had two maxima of brightness, at T-65 and T-20 days before perihelion, and that the apparent magnitude was 10 magnitudes fainter that the predicted one.


References:

Ye, Q., Hui, M.T.: 2020, Continuing Fragmentation of C/2019 Y4 (ATLAS). The Astronomer’s Telegram 13651, 1.

Acknowledgement:
This research has made use of the scientific software at www.comet-toolbox.com (Vincent, J.- B., Comet-toolbox: numerical simulations of cometary dust tails in your browser, Asteroids Comets Meteors conference, 2014, Helsinki). This work was supported by grants of the Ministry of National Education and Scientific Research, RDI Program for Space Technology and Advanced Research - STAR, project number 513, and the French-Romanian bilateral programme PICS-SEEING.