Results 61 to 70 of about 85,468 (250)
The Hermean Helium Exosphere—Continuous and Sporadic Helium Release Processes
Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.Abstract Since its detection by Mariner 10, helium has been a key focus in studies of Mercury's exosphere. Recently, Weichbold et al. (2025), https://doi.org/10.1029/2024je008679 provided the first in situ helium measurements, inferring density from Ion Cyclotron Wave (ICW) events observed by the MESSENGER spacecraft.
J. Hener +5 more
wiley +1 more source
Asteroid rotation and orbit control via laser ablation [PDF]
Advances in Space Research, 2016 This paper presents an approach to control the rotational motion of an asteroid while a spacecraft is deflecting its trajectory through laser ablation. During the deflection, the proximity motion of the spacecraft is coupled with the orbital and rotational motion of the asteroid. The combination of the deflection acceleration, solar radiation pressure,
Vetrisano, Massimo +2 more
openaire +5 more sources
Open AstronomyWe discovered 83 asteroids at the Baldone Astrophysical Observatory (MPC code 069) in 2017–2022. We studied one of the dynamically interesting Apollo (Near Earth object) observed at the Baldone Astronomical Observatory, namely 428694 Saule (2008 OS9) and
Wlodarczyk Ireneusz +2 more
doaj +1 more source
A 2 km-size asteroid challenging the rubble-pile spin barrier - a case for cohesion [PDF]
, 2015 The rubble pile spin barrier is an upper limit on the rotation rate of asteroids larger than ~200-300 m. Among thousands of asteroids with diameters larger than ~300 m, only a handful of asteroids are known to rotate faster than 2.0 h, all are in the sub-km range (<=0.6 km). Here we present photometric measurements suggesting that (60716) 2000 GD65, an
arxiv +1 more source
Review of asteroid, meteor, and meteorite‐type links
Meteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens +1 more
wiley +1 more source
Puzzling rotation of asteroid 288 Glauke [PDF]
Astronomy & Astrophysics, 2003 Most asteroids rotate about their axis of maximum moment of inertia. However, for several small asteroids with very slow rotation rates, the damping time scale is expected to be longer than the age of the Solar System, implying that these objects may exhibit non-principal axis rotation.
Tadeusz Michalowski +2 more
openaire +2 more sources
The Cumulation of Debris Clouds around a Fast-rotating Asteroid
The Astrophysical JournalThe rotational mass loss has been realized to be a prevalent mechanism to produce low-speed debris near the asteroid, and the size composition of the asteroid’s surface regolith has been closely measured by in situ explorations.
Chenyang Huang +5 more
doaj +1 more source
Exploring the origins of magnetization within the Chicxulub crater upper peak ring
Meteoritics &Planetary Science, Volume 60, Issue 4, Page 823-848, April 2025.Abstract Large terrestrial impacts may produce vast subsurface hydrothermal systems, capable of generating conditions favorable to the origin of life. Modeling suggests that these systems may persist for >1 million years for basin‐sized craters; however, direct experimental constraints on hydrothermal system duration are needed.
Christina M. Verhagen +13 more
wiley +1 more source
Asteroid Discovery and Light Curve Extraction Using the Hough Transform -- A Rotation Period Study for Sub-Kilometer Main-Belt Asteroids [PDF]
, 2019 The intra-night trajectories of asteroids can be approximated by straight lines, and so are their intra-night detections. Therefore, the Hough transform, a line detecting algorithm, can be used to connect the line-up detections to find asteroids. We applied this algorithm to a high-cadence Pan-STARRS 1 (PS1) observation, which was originally designed ...
arxiv +1 more source
Microfaults: Abundant shear deformation and frictional melting in chondrites
Meteoritics &Planetary Science, Volume 60, Issue 4, Page 858-868, April 2025.Abstract The majority of ordinary chondrite (OC) meteorites record some amount of textural evidence for impact‐induced deformation. Melt veins in some shocked samples have been compared to terrestrial impact‐related pseudotachylites, which form by frictional melting of host rock.
Craig R. Walton +2 more
wiley +1 more source