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Related papers: Comparing the NEATM with a Rotating, Cratered Ther…

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Asteroids and comets dissipate energy when they rotate about the axis different from the axis of the maximal moment of inertia. We show that the most efficient internal relaxation happens at the double frequency of body's tumbling.…

Astrophysics · Physics 2016-08-30 Michael Efroimsky , A. Lazarian

We present THERMAP, a mid-infrared (8-16 {\mu}m) spectro-imager for space missions to small bodies in the inner solar system, developed in the framework of the MarcoPolo-R asteroid sample return mission. THERMAP is very well suited to…

The near-Earth asteroid (NEA) 2015 TB145 had a very close encounter with Earth at 1.3 lunar distances on October 31, 2015. We obtained 3-band mid-infrared observations with the ESO VLT-VISIR instrument and visual lightcurves during the…

Earth and Planetary Astrophysics · Physics 2017-02-08 T. G. Müller , A. Marciniak , M. Butkiewicz-Bąk , R. Duffard , D. Oszkiewicz , H. U. Käufl , R. Szakáts , T. Santana-Ros , C. Kiss , P. Santos-Sanz

Asteroids smaller than about 100 meters are observed to rotate very fast, with periods often much shorter than the critical limit of 2.2 h. Some of these super-fast rotators can also achieve a very large semi-major axis drift induced by the…

Earth and Planetary Astrophysics · Physics 2023-07-12 Marco Fenucci , Bojan Novaković , Dušan Marčeta

The Asteroid Terrestrial-impact Last Alert System (ATLAS) is an all-sky survey primarily aimed at detecting potentially hazardous near-Earth asteroids. Apart from the astrometry of asteroids, it also produces their photometric measurements…

Earth and Planetary Astrophysics · Physics 2020-11-04 J. Durech , J. Tonry , N. Erasmus , L. Denneau , A. N. Heinze , H. Flewelling , R. Vanco

We calculate the rotational broadening in the observed thermal spectra of neutron stars spinning at moderate rates in the Hartle-Thorne approximation. These calculations accurately account for the effects of the second-order Doppler boosts…

High Energy Astrophysical Phenomena · Physics 2016-08-17 Michi Baubock , Feryal Ozel , Dimitrios Psaltis , Sharon M. Morsink

Multiple terrestrial and space-based telescopes have been proposed for detecting and tracking near-Earth objects (NEOs). Detailed simulations of the search performance of these systems have used complex computer codes that are not widely…

Earth and Planetary Astrophysics · Physics 2016-03-23 Nathan Myhrvold

We used the reparameterized Near-Earth Asteroid Thermal Model to model observations of a curated set of over 4000 asteroids from the Wide-field Infrared Survey Explorer in two wavelength bands (W2-3 or W3-4) and compared the results to…

Earth and Planetary Astrophysics · Physics 2023-04-14 Emily A. Whittaker , Jean-Luc Margot , Adrian L. H. Lam , Nathan Myhrvold

A theory of thermal and nonthermal radiation in a vacuum background of arbitrary temperature generated by relativistic polarizable particle with spin is proposed. When the particle rotates, radiation is produced by vacuum fluctuations even…

Mesoscale and Nanoscale Physics · Physics 2014-12-17 A. A. Kyasov , G. V Dedkov

We present an analysis of the accuracy of geometric albedos determined for asteroids through the modeling of observed thermal infrared radiation. We show that albedo uncertainty is dominated by the uncertainty on the measured $H_V$ absolute…

Earth and Planetary Astrophysics · Physics 2021-01-11 Joseph R. Masiero , E. L. Wright , A. K. Mainzer

The Asteroid Redirect Mission (ARM) proposes to retrieve a near-Earth asteroid and position it in a lunar distant retrograde orbit (DRO) for later study, crewed exploration, and ultimately resource exploitation. During the Caltech Space…

Earth and Planetary Astrophysics · Physics 2015-05-15 Javier Roa , Casey J. Handmer

The bremsstrahlung cross section for relativistic electrons in a crystal is split into the sum of coherent and incoherent parts (the last is due to a thermal motion of atoms in the crystal). Although the spectrum of incoherent radiation in…

Accelerator Physics · Physics 2010-06-04 N. F. Shul'ga , V. V. Syshchenko , A. I. Tarnovsky

A fraction of the electromagnetic radiation emitted from the surface of a geometrically thin and optically thick accretion disk of a black hole returns to the disk because of the strong light bending in the vicinity of the compact object…

High Energy Astrophysical Phenomena · Physics 2021-03-26 Shafqat Riaz , Michal Szanecki , Andrzej Niedzwiecki , Dimitry Ayzenberg , Cosimo Bambi

In this article we consider different methods of modeling asteroid shapes, especially lightcurve inversion technique, and scattering laws used for it. We also introduce our program, which constructs lightcurves for a given asteroid shape…

Earth and Planetary Astrophysics · Physics 2016-01-27 Andrii Kokorev , Oleksiy Golubov

The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) reactivation mission has completed its third year of surveying the sky in the thermal infrared for near-Earth asteroids and comets. NEOWISE collects simultaneous…

Earth and Planetary Astrophysics · Physics 2017-10-04 Joseph R. Masiero , C. Nugent , A. K. Mainzer , E. L. Wright , J. M. Bauer , R. M. Cutri , T. Grav , E. Kramer , S. Sonnett

Surface shedding of an asteroid is a failure mode where surface materials fly off due to strong centrifugal forces beyond the critical spin period, while the internal structure does not deform significantly. This paper proposes a possible…

Earth and Planetary Astrophysics · Physics 2015-08-06 Masatoshi Hirabayashi , Diego Paul S'anchez , Daniel J. Scheeres

Near-Earth asteroid (1862) Apollo has strong detections of both orbital semimajor axis drift and rotational acceleration. We produce a unified model that can accurately match both observed effects using a single set of thermophysical…

Earth and Planetary Astrophysics · Physics 2015-06-15 Ben Rozitis , Sam R. Duddy , Simon F. Green , Stephen C. Lowry

(abridged) We calculate near-infrared thermal emission spectra using a doubling-adding radiative transfer code, which includes scattering by clouds and haze. Initial temperature profiles and cloud optical depths are taken from the…

Earth and Planetary Astrophysics · Physics 2011-08-08 R. J. de Kok , Ch. Helling , D. M. Stam , P. Woitke , S. Witte

We describe interferometric observations of the asteroid (41) Daphne in the thermal infrared obtained with the Mid-Infrared Interferometric Instrument (MIDI) of the Very Large Telescope Interferometer (VLTI). We derived the size and the…

Earth and Planetary Astrophysics · Physics 2015-03-19 Alexis Matter , Marco Delbo , Sebastiano Ligori , Nicolas Crouzet , Paolo Tanga

Fractals are defined as geometric shapes that exhibit symmetry of scale. This simply implies that fractal is a shape that it would still look the same even if somebody could zoom in on one of its parts an infinite number of times. This…

Space Physics · Physics 2015-05-29 Ioannis Haranas , Ioannis Gkigkitzis , Athanasios Alexiou
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