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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:33 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Photometric observations of five asteroids at Pic du Midi
Authors:
B.A. DUMITRU(1,2,3), M. BIRLAN(2,3), A. SONKA (4,3), F. COLAS(2), and D. A. NEDELCU(4,2)
*
Affiliation:
1) Institute of Space Science
2) Paris Observatory – IMCCE
3) Faculty of Physics, Bucharest University
4) Astronomical Institute of Romanian Academy
E-mail
bogdan.dumitru@spacescience.ro
Keywords:
Asteroids, Near Earth Asteroids, NEAs, photometry, colors, Pic du Midi
Abstract:
The meteor showers represent the ablation of solid particles or fragments, namely meteoroids, in the upper atmosphere of the Earth. The main source of these meteoroids are comets and asteroids (Jopek et al., 2013). In order to have a relationship between the meteor shower and the body that produce them, it is necessary for the asteroid to be in the proximity of Earth’s orbit. Those asteroids are called Near Earth Asteroids (NEA). A systematic research of asteroids that could produce meteors based on dynamical similarities between asteroids and meteor showers was recently started (Dumitru et al., 2017). The authors produced a list of objects, mainly NEAs, which can be associated with meteor showers. For a robust association one has to look at the physical parameters of the associated parent bodies. The main source for the asteroids physical parameters was the literature, but many of them do not have all the necessary data (only 10% of the associations have sparse physical data). Also, it is very difficult to observe this population. For this kind of asteroids, the opportunity to get an observing window is approximately one or two weeks during their close approach to Earth. The favorable geometry for this objects occurs, in average, five times per century (Birlan et al., 2015). For this reason, we developed an observational project dedicated to the acquisition of relevant physical data on the candidate asteroids (lightcurves, colors and spectra) (Dumitru et al., 2018). Our results are based on the optical observation at Pic du Midi observatory in April 6-7, 2016 and January 17-18, 2018. We will present the lightcurve of asteroid (259221) 2003 BA21 associated to Daytime Sextantids (221DSX) and November Θ Aurigids (390 THA), the lightcurves and colors of asteroid (363599) 2004 FG11, associated with Daytime ζ Perseids (172 ZPE) as well as g - r and g - i and the corresponding reflectances for the (85953) 1999 FK21 associated with Daytime ξ Sagittariids (100 XSA). Also we will present the colors for two additional objects, namely (5141) Tachibana and (43032) 1999 VR26 (Dumitru et al., 2018).
References:
Birlan, M., Popescu, M., Nedelcu, D. A., et al. 2015, A&A, 581, A3.
Dumitru, B.A., Birlan, M., Popescu, M., Nedelcu, D.A.: 2017, A&A. 607, A5.
Dumitru BA, Birlan M, Sonka A, Colas F, Nedelcu A. Astron. Nachr./AN. 2018;1–6.
Jopek, T.J., Williams, I.P.: 2013, Mon. Not. Roy. Astron. Soc. 430, 2377 – 2389.
Acknowledgement:
This article contains data provided by observations run obtained using T1M at Pic du Midi Observatory, France. This research has made use of ”Aladin sky atlas” developed at CDS, Strasbourg Observatory, France. This work was supported by Astronomical Institute of the Romanian Academy, Paris Observatory PICS–PASSO program, Institute of Space Science and by a grant of the Romanian National Authority for Scientific Research UEFISCDI, project number PN–II–RU–TE–2014–4–2199.
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