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New Evidence for a Physical Link between Asteroids (155140) 2005 UD and (3200) Phaethon

Devogèle, Maxime (författare)
Lowell Observatory, 1400 W. Mars Hill Rd., Flagstaff, AZ 86001, USA
MacLennan, Eric (författare)
Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland
Gustafsson, Annika (författare)
Department of Astronomy & Planetary Science, Northern Arizona University, P.O. Box 6010, Flagstaff, AZ 86011, USA
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Moskovitz, Nicholas (författare)
Lowell Observatory, 1400 W. Mars Hill Rd., Flagstaff, AZ 86001, USA
Chatelain, Joey (författare)
Las Cumbres Observatory, CA, USA
Borisov, Galin (författare)
Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK. Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72, Tsarigradsko Chaussèe Blvd., Sofia BG-1784, Bulgaria
Abe, Shinsuke (författare)
Aerospace Engineering, Nihon University, 7-24-1 Narashinodai, Funabashi, Chiba 2748501, Japan
Arai, Tomoko (författare)
Planetary Exploration Research Center, Chiba Institute of Technology, Narashino, Japan
Fedorets, Grigori (författare)
Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland; Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
Ferrais, Marin (författare)
Space sciences, Technologies & Astrophysics Research (STAR) Institute University of Liège Allée du 6 Août ut 19, B-4000 Liège, Belgium; Aix Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, F-13388, Marseille, France; Space sciences, Technologies, France
Granvik, Mikael (författare)
Luleå tekniska universitet,Rymdteknik,Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland
Jehin, Emmanuel (författare)
Space sciences, Technologies & Astrophysics Research (STAR) Institute University of Liège Allée du 6 Août 19, B-4000 Liège, Belgium
Siltala, Lauri (författare)
Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland; Nordic Optical Telescope, Apartado 474, E-38700 S/C de La Palma, Santa Cruz de Tenerife, Spain
Pöntinen, Mikko (författare)
Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland
Mommert, Michael (författare)
Lowell Observatory, 1400 W. Mars Hill Rd., Flagstaff, AZ 86001, USA
Polishook, David (författare)
Faculty of Physics, Weizmann Institute of Science, 234 Herzl St. Rehovot 7610001, Israel
Skiff, Brian (författare)
Lowell Observatory, 1400 W. Mars Hill Rd., Flagstaff, AZ 86001, USA
Tanga, Paolo (författare)
Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Boulevard de l'Observatoire, CS34229, F-06304 Nice Cedex 4, France
Yoshida, Fumi (författare)
Planetary Exploration Research Center, Chiba Institute of Technology, Narashino, Japan
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Lowell Observatory, 1400 W Mars Hill Rd., Flagstaff, AZ 86001, USA Department of Physics, P.O. Box 64, FI-00014 University of Helsinki, Finland (creator_code:org_t)
Institute of Physics (IOP), 2020
2020
Engelska.
Ingår i: The Planetary Science Journal. - : Institute of Physics (IOP). - 2632-3338. ; 1:1
Relaterad länk:
https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
https://doi.org/10.3...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • In 2018, the near-Earth object (155140) 2005 UD (hereafter UD) experienced a close fly by of the Earth. We present results from an observational campaign involving photometric, spectroscopic, and polarimetric observations carried out across a wide range of phase angles (07–88°). We also analyze archival NEOWISE observations. We report an absolute magnitude of H V = 17.51 ± 0.02 mag and an albedo of p V = 0.10 ± 0.02. UD has been dynamically linked to Phaethon due their similar orbital configurations. Assuming similar surface properties, we derived new estimates for the diameters of Phaethon and UD of D = 5.4 ± 0.5 km and D = 1.3 ± 0.1 km, respectively. Thermophysical modeling of NEOWISE data suggests a surface thermal inertia of  and regolith grain size in the range of 0.9–10 mm for UD and grain sizes of 3–30 mm for Phaethon. The light curve of UD displays a symmetric shape with a reduced amplitude of Am(0) = 0.29 mag and increasing at a linear rate of 0.017 mag/° between phase angles of 0° and ~25°. Little variation in light-curve morphology was observed throughout the apparition. Using light-curve inversion techniques, we obtained a sidereal rotation period P = 5.235 ± 0.005 hr. A search for rotational variation in spectroscopic and polarimetric properties yielded negative results within observational uncertainties of ~10% μm−1 and ~16%, respectively. In this work, we present new evidence that Phaethon and UD are similar in composition and surface properties, strengthening the arguments for a genetic relationship between these two objects.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Near-Earth objects
CCD observation
Astronomical techniques
Photometry
Polarimetry
Spectroscopy
Onboard Space Systems
Rymdtekniska system

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ref (ämneskategori)
art (ämneskategori)

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