UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-07-01 16:31

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Conference: Bucharest University Faculty of Physics 2019 Meeting


Section: Atmosphere and Earth Science; Environment Protection


Title:
Physical Parameters of Near Earth Asteroids


Authors:
Adrian ȘONKA(1,2), Mirel BÎRLAN(3,2), Andreea GORNEA(2), Ioana BOIAN(2)


*
Affiliation:
1) Faculty of Physics, University of Bucharest, 405 Atomistilor, 077125 Magurele, Ilfov, Romania

2) Astronomical Institute of Romanian Academy, Cutitul de Argint, 040557 Bucharest, Romania

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


E-mail
sonka.adrian@gmail.com


Keywords:
minor planets, photometry


Abstract:
We present phase curves for 8 NEAs, 7 objects of taxonomic type S and one of K type. The objects were observed during 2017-2018 from The Astronomical Institute of the Romanian Academy. We have pre-opposition data for (85989) 1999 JD6, (155140) 2005 UD and (418849) 2008 WM64, and post-opposition data for (333888) 1998 ST4, (276033) 2002 AJ129, and 2012 TC4. In all the cases except 1999 JD6 we find a good match of our data with the modelled phase curve. All the data points for 1999 JD6 are for phase angles larger than 46◦, values for which the HG model is not very accurate. We find two close data points that do not match, a clear sign of different observing conditions. We also find a mismatch of close data points in the case of 2012 TC4 a fast moving asteroid with a variable rotational period and amplitude of brightness variation.


Acknowledgement:
This work was supported by a grant of the Ministry of National Education and Scientific Research, RDI Program for Space Technology and Advanced Research - STAR, project number 513 and ARGOSS MCI Contract No. 11 PS/2017.