The triple near-Earth asteroid (153591) 2001 SN263: an ultra-blue, primitive target for the Aster space mission

Perna, D.; Álvarez-Candal, A.; Fornasier, S.; Kaňuchová, Z.; Winter, S. M. Giuliatti; Neto, E. Vieira; Winter, O. C.

doi:10.1051/0004-6361/201424447

Cited by 16 publications

(12 citation statements)

References 27 publications

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“…Our spectral analysis agrees with that of Perna et al (2014). More extensive spectral coverage results in a more definitive taxonomic class identification.…”

Section: Spectrasupporting

confidence: 82%

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Physical modeling of triple near-Earth Asteroid (153591) 2001 SN263 from radar and optical light curve observations

Becker

Howell

Nolan

et al. 2015

Icarus

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a b s t r a c tWe report radar observations (2380-MHz, 13-cm) by the Arecibo Observatory and optical light curves observed from eight different observatories and collected at the Ondřejov Observatory of the triple near-Earth asteroid system (153591) 2001 SN 263 . The radar observations were obtained over the course of ten nights spanning February 12-26, 2008 and the light curve observations were made throughout January 12 -March 31, 2008. Both data sets include observations during the object's close approach of 0.06558 AU on February 20th, 2008. The delay-Doppler images revealed the asteroid to be comprised of three components, making it the first known triple near-Earth asteroid. Only one other object, (136617) 1994 CC is a confirmed triple near-Earth asteroid.We present physical models of the three components of the asteroid system. We constrain the primary's pole direction to an ecliptic longitude and latitude of ð309 ; À80 Þ AE 15 . We find that the primary rotates with a period 3:4256 AE 0:0002 h and that the larger satellite has a rotation period of 13:43 AE 0:01 h, considerably shorter than its orbital period of approximately 6 days. We find that the rotation period of the smaller satellite is consistent with a tidally locked state and therefore rotates with a period of 0:686 AE 0:002 days (Fang et al. [2011]. Astron. J. 141, 154-168). The primary, the larger satellite, and the smaller satellite have equivalent diameters of 2:5 AE 0:3 km, 0:77 AE 0:12 km, 0:43 AE 0:14 km and densities of 1:1 AE 0:2 g=cm 3 ; 1:0 AE 0:4 g=cm 3 ; 2:3 AE 1:3 g=cm 3 , respectively.

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“…Our spectral analysis agrees with that of Perna et al (2014). More extensive spectral coverage results in a more definitive taxonomic class identification.…”

Section: Spectrasupporting

confidence: 82%

“…The combined spectrum of Bennu is shown for comparison, offset for clarity. SN 263 inclined by6:7 (Minor Planet Center, 2001;Perna et al, 2014). These similarities may suggest a common origin, and the samples expected from Bennu may be similar in composition to objects like 2001 SN 263 .…”

mentioning

confidence: 91%

Physical modeling of triple near-Earth Asteroid (153591) 2001 SN263 from radar and optical light curve observations

Becker

Howell

Nolan

et al. 2015

Icarus

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“…On September 20th of 2001 the LINEAR survey discovered the asteroid (153591) 2001 SN263 (Stokes et al 2000). Radar observations made by the Arecibo Observatory on February 12th of 2008, when it made its closest approach to Earth at a distance of 0.06558 au, revealed it is composed of three components (Nolan et al 2008). Early spectroscopic observations indicated that it is a B-type asteroid in the Bus-DeMeo taxonomy (DeMeo et al 2009).…”

mentioning

confidence: 99%

“…Later, Perna et al (2014) investigated the surface composition of the asteroid 2001 SN263 and compared its reflectance spectra with laboratory spectra of meteorites and minerals. They found a featureless convex spectrum (Polanaor Themis-like), confirming it as a B-type.…”

mentioning

confidence: 99%

Asteroid triple-system 2001 SN263: surface characteristics and dynamical environment

Winter

Valvano

Moura

et al. 2020

Monthly Notices of the Royal Astronomical Society

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The (153591) 2001 SN 263 asteroid system, target of the first Brazilian interplanetary space mission, is one of the known three triple systems within the population of NEAs. One of the mission objectives is to collect data about the formation of this system. The analysis of these data will help in the investigation of the physical and dynamical structures of the components (Alpha, Beta and Gamma) of this system, in order to find vestiges related to its origin. In this work, we assume the irregular shape of the 2001 SN 263 system components as uniform density polyhedra and computationally investigate the gravitational field generated by these bodies. The goal is to explore the dynamical characteristics of the surface and environment around each component. Then, taking into account the rotational speed, we analyze their topographic features through the quantities geometric altitude, tilt, geopotential, slope, surface accelerations, among others. Additionally, the investigation of the environment around the bodies made it possible to construct zero-velocity curves, which delimit the location of equilibrium points. The Alpha component has a peculiar number of 12 equilibrium points, all of them located very close to its surface. In the cases of Beta and Gamma, we found four equilibrium points not so close to their surfaces. Then, performing numerical experiments around their equilibrium points, we identified the location and size of just one stable region, which is associated with an equilibrium point around Beta. Finally, we integrated a spherical cloud of particles around Alpha and identified the location on the surface of Alpha were the particles have fallen.

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“…A previous classification of this binary was performed by Perna et al (2014) who found it to be B type.…”

Section: A22 (153591) 2001 Sn 263mentioning

confidence: 99%

Spectral properties of binary asteroids

Pajuelo

Birlan

Carry

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We present the first attempt to characterize the distribution of taxonomic class among the population of binary asteroids (15 per cent of all small asteroids). For that, an analysis of 0.8-2.5 μm near-infrared spectra obtained with the SpeX instrument on the NASA/IRTF is presented. Taxonomic class and meteorite analogue is determined for each target, increasing the sample of binary asteroids with known taxonomy by 21 per cent. Most binary systems are bound in the S, X, and C classes, followed by Q and V types. The rate of binary systems in each taxonomic class agrees within uncertainty with the background population of small near-Earth objects and inner main belt asteroids, but for the C types which are under-represented among binaries.

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The triple near-Earth asteroid (153591) 2001 SN263: an ultra-blue, primitive target for the Aster space mission

Cited by 16 publications

References 27 publications

Physical modeling of triple near-Earth Asteroid (153591) 2001 SN263 from radar and optical light curve observations

Physical modeling of triple near-Earth Asteroid (153591) 2001 SN263 from radar and optical light curve observations

Asteroid triple-system 2001 SN263: surface characteristics and dynamical environment

Spectral properties of binary asteroids

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