Results 41 to 50 of about 121,017 (322)

Astronomical Observations of Volatiles on Asteroids [PDF]

open access: yes, 2015
We have long known that water and hydroxyl are important components in meteorites and asteroids. However, in the time since the publication of Asteroids III, evolution of astronomical instrumentation, laboratory capabilities, and theoretical models have ...
A. Rivkin   +6 more
semanticscholar   +1 more source

Collision and annihilation of relative equilibrium points around asteroids with a changing parameter [PDF]

open access: yes, 2015
In this work, we investigate the bifurcations of relative equilibria in the gravitational potential of asteroids. A theorem concerning a conserved quantity, which is about the eigenvalues and number of relative equilibria, is presented and proved.
Yu Jiang, H. Baoyin, H. Li
semanticscholar   +1 more source

Environmental Impact of Silicic Magmatism in Large Igneous Province Events

open access: yesGeophysical Monograph Series, Page 133-151., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Scott E. Bryan
wiley  

+2 more sources

INTERNAL STRUCTURE OF ASTEROIDS HAVING SURFACE SHEDDING DUE TO ROTATIONAL INSTABILITY [PDF]

open access: yes, 2015
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 structure of an
M. Hirabayashi   +2 more
semanticscholar   +1 more source

Aqueous alteration on main belt primitive asteroids: results from visible spectroscopy

open access: yes, 2014
This work focuses on the study of the aqueous alteration process which acted in the main belt and produced hydrated minerals on the altered asteroids.
Barucci, M. A.   +3 more
core   +2 more sources

ASTEROIDS EXPLORATION WITH BALDONE SCHMIDT TELE-SCOPE

open access: yesOdessa Astronomical Publications, 2018
CCD observations of asteroids were ob-tained in 2008 with the Baldone Schmidt telescope (aper-ture/diameter/focal length = 80/120/240 cm) at the Bal-done Astrophysical observatory (code 069) of the Institute of Astronomy of the University of Latvia.
I. Eglitis
doaj   +1 more source

Trajectory Design Employing Convex Optimization for Landing on Irregularly Shaped Asteroids

open access: yesJournal of Guidance Control and Dynamics, 2016
The problem under investigation is how to rapidly design a propellant optimal powered descent trajectory to land a spacecraft on an arbitrarily shaped asteroid, subject to realistic constraints on ...
R. Pinson, P. Lu
semanticscholar   +1 more source

AVAST Survey 0.4-1.0 {\mu}m Spectroscopy of Igneous Asteroids in the Inner and Middle Main Belt

open access: yes, 2012
We present the spectra of 60 asteroids, including 47 V-types observed during the first phase of the Adler V-Type Asteroid (AVAST) Survey. SDSS photometry was used to select candidate V-type asteroids for follow up by nature of their very blue $i-z$ color.
Abazajian   +48 more
core   +1 more source

Inelastic Dissipation in Wobbling Asteroids and Comets [PDF]

open access: yes, 1998
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.
A. Lazarian   +4 more
core   +3 more sources

Period-Multiplying Bifurcations in the Gravitational Field of Asteroids

open access: yesAerospace
Periodic orbit families around asteroids serve as potential trajectories for space probes, mining facilities, and deep space stations. Bifurcations of these families provide additional candidate orbits for efficient trajectory design around asteroids ...
P. Rishi Krishna, Joel George Manathara
doaj   +1 more source

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