Article
Astronomy & Astrophysics
Wen-Han Zhou, Yun Zhang, Xiaoran Yan, Patrick Michel
Summary: The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect is important in the behavior of asteroids. This study focuses on the influence of craters on the YORP effect, introducing the crater-induced YORP effect (CYORP). The research shows that craters and roughness on asteroid surfaces can significantly affect the YORP torque.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Ryota Nakano, Masatoshi Hirabayashi
Summary: We have developed a new thermophysical model that can accurately simulate the thermal conditions of small celestial bodies, such as asteroids and comet nuclei, and also consider local topographic features. The model considers heat conduction between neighboring elements and includes factors such as scattering sunlight, self-heating, and shadows. We validated the model and compared it with previous works and observational data of asteroid (101955) Bennu.
Article
Astronomy & Astrophysics
Nair Trogolo, Adriano Campo Bagatin, Fernando Moreno, Paula G. Benavidez
Summary: A recent study published in the journal of Celestial Mechanics and Dynamical Astronomy shows that the spin rates of Near Earth Asteroids (NEAs) are increasing, and some of them may experience outward acceleration near the equator, allowing material to be lifted off their surfaces. Researchers have investigated the dynamics of particles in this environment and estimated the take-off and landing areas on one specific asteroid. The study also reveals that large particles dominate the mass density distribution, while the abundance of small particles depends on the observation epoch.
Article
Astronomy & Astrophysics
Alan W. Harris, Paul W. Chodas
Summary: This paper updates the population estimate of Near-Earth Asteroids (NEAs) and corrects previous issues in studies, while introducing an updated model distribution of NEA orbits in survey simulations. The study shows that the redetection algorithm is robust and mostly independent of survey parameters.
Article
Astronomy & Astrophysics
Conor J. Benson, Daniel J. Scheeres, Marina Brozovic, Steven R. Chesley, Petr Pravec, Petr Scheirich
Summary: This study explores the effects of the 2029 Earth encounter on the non-principal axis spin state of asteroid (99942) Apophis, providing valuable information for observation campaigns and spacecraft missions. The simulations show that gravitationally induced changes to the asteroid's tumbling periods and rotational angular momentum direction will likely be significant and measurable. The study also discusses the implications of the spin state alteration on Apophis' geophysical properties, identifying possible surface and internal changes.
Article
Astronomy & Astrophysics
P. Scheirich, P. Pravec, P. Kusnirak, K. Hornoch, J. McMahon, D. J. Scheeres, D. Capek, D. P. Pray, H. Kucakova, A. Galad, J. Vrastil, Yu N. Krugly, N. Moskovitz, L. D. Avner, B. Skiff, R. S. McMillan, J. A. Larsen, M. J. Brucker, A. F. Tubbiolo, W. R. Cooney, J. Gross, D. Terrell, O. Burkhonov, K. E. Ergashev, Sh A. Ehgamberdiev, P. Fatka, R. Durkee, E. Lilly Schunova, R. Ya Inasaridze, V. R. Ayvazian, G. Kapanadze, N. M. Gaftonyuk, J. A. Sanchez, V Reddy, L. McGraw, M. S. Kelley, I. E. Molotov
Summary: Thorough photometric observations of two binary near-Earth asteroids, (66391) Moshup = 1999 KW4 and (88710) 2001 SL9, conducted from 2000 to 2019, revealed orbital drift and varying dynamical properties. The study suggests the presence of equilibrium, expanding, and contracting mutual orbit evolution states in near-Earth binary asteroids.
Article
Astronomy & Astrophysics
J. Durech, D. Vokrouhlicky, P. Pravec, Yu. N. Krugly, M. -J. Kim, D. Polishook, V. V. Ayvazian, T. Bonev, Y. -J. Choi, D. G. Datashvili, Z. Donchev, S. A. Ehgamberdiev, K. Hornoch, R. Ya. Inasaridze, G. V. Kapanadze, D. -H. Kim, H. Kucakova, A. V. Kusakin, P. Kusnirak, H. -J. Lee, I. E. Molotov, H. -K. Moon, S. S. Mykhailova, I. V. Nikolenko, A. Novichonok, J. Oey, Ch. T. Omarov, J. T. Pollock, I. V. Reva, V. V. Rumyantsev, A. A. Zhornichenko
Summary: By conducting new photometric observations, we detected the YORP effect in three near-Earth asteroids, with one asteroid showing a rotation acceleration that matches the theoretical value. We also discovered a new feature, the effect of solar precession.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Tarik J. Zegmott, S. C. Lowry, A. Rozek, B. Rozitis, M. C. Nolan, E. S. Howell, S. F. Green, C. Snodgrass, A. Fitzsimmons, P. R. Weissman
Summary: The YORP effect is crucial for the physical and dynamical evolution of small asteroids. Through observations of (68346) 2001 KZ66, researchers found it to be a retrograde rotator with a bifurcated shape.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Engineering, Aerospace
Livia Ionescu, Colin R. McInnes, Matteo Ceriotti
Summary: The use of asteroid resources can benefit future space missions by reducing the need to extract materials from Earth. This paper introduces a new strategy for asteroid capture missions, using two spacecraft to capture near-Earth asteroids. Compared to the conventional one-spacecraft strategy, this novel two-spacecraft strategy allows for more efficient retrieval of asteroid resources.
Article
Astronomy & Astrophysics
Filipe Monteiro, Daniela Lazzaro, Eduardo Rondon, Plicida Arcoverde, Marcal Evangelista-Santana, Jonatan Michimani, Weslley Pereira, Wesley Mesquita, Hissa Medeiros, Tatiane Correa, Jose Silva-Cabrera, Teresinha Rodrigues
Summary: This paper presents photometric observations of about 80 NEAs conducted with a 1-m telescope in Brazil. The rotational periods and lightcurve amplitudes of 46 objects were determined, including 15 Potentially Hazardous Asteroids (PHAs). The observations also revealed binary systems with possible satellites among the NEAs.
Article
Astronomy & Astrophysics
S. L. Jackson, B. Rozitis, L. R. Dover, S. F. Green, U. C. Kolb, A. E. Andrews, S. C. Lowry
Summary: This study demonstrates that the phase curves of asteroids depend not only on the scattering properties and size, but also on the shape, rotation pole orientation, and viewing geometry of the object. Ignoring this aspect effect may lead to misleading interpretations of the data and underestimation of uncertainties in further studies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Rogerio Deienno, Kevin J. Walsh, Marco Delbo
Summary: The Yarkovsky effect causes asteroid family members to spread in orbital semimajor axis, forming V-shaped structures, with the V-shape searching method being sensitive to parameters and effective for detecting asteroid families younger than about 3 billion years.
Article
Astronomy & Astrophysics
C. de la Fuente Marcos, R. de la Fuente Marcos
Summary: The study identified three new Mars Trojans and proposed a mechanism possibly related to the formation of co-orbital minor bodies. Clustering phenomena were also observed in Earth co-orbital candidates, potentially linked to disruption events.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Engineering, Aerospace
Amirah R. Algethami, Colin R. McInnes, Matteo Ceriotti
Summary: This paper utilizes the Hill's approximation model to manipulate the relative motion of two asteroids by three impulses, resulting in their bound binary motion in Earth's orbit. The feasibility of this strategy is demonstrated, and potential applications for parking small captured near-Earth asteroids in Earth's orbit are discussed.
Article
Astronomy & Astrophysics
Stephen M. Slivan, Matthew Hosek, Max Kurzner, Alyssa Sokol, Sarah Maynard, Anna V. Payne, Arden Radford, Alessondra Springmann, Richard P. Binzel, Francis P. Wilkin, Emily A. Mailhot, Alan H. Midkiff, April Russell, Robert D. Stephens, Vincent Gardiner, Daniel E. Reichart, Joshua Haislip, Aaron LaCluyze, Raoul Behrend, Rene Roy
Summary: This observational study focuses on the spin properties of Koronis family members, aiming to reduce biases in object rotation period and lightcurve amplitude and improve modeling of spin evolution. The study presents rotation lightcurves of 19 Koronis family members, increasing the sample of determined spin vectors to include 34 of the largest 36 family members. The analysis suggests that the distributions of retrograde rotation rates and pole obliquities are consistent with modification by thermal YORP torques.
