Results 251 to 260 of about 399,303 (277)

Irregular Satellites in the Context of Planet Formation

Space Science Reviews, 2005
All four giant planets in the solar system possess irregular satellites, characterized by large, highly eccentric and/or highly inclined orbits. These bodies were likely captured from heliocentric orbit, probably in association with planet formation itself. Enabled by the use of large-format digital imagers on ground-based telescopes, new observational
Scott S. Sheppard, David C. Jewitt
exaly   +2 more sources

Three-Body Capture of Irregular Satellites: Application to Jupiter [PDF]

Icarus, 2010
We investigate a new theory of the origin of the irregular satellites of the giant planets: capture of one member of a ~100-km binary asteroid after tidal disruption. The energy loss from disruption is sufficient for capture, but it cannot deliver the bodies directly to the observed orbits of the irregular satellites.
Douglas Hamilton
exaly   +3 more sources

An Abundant Population of Small Irregular Satellites Around Jupiter

Nature, 2003
Irregular satellites have eccentric orbits that can be highly inclined or even retrograde relative to the equatorial planes of their planets. These objects cannot have formed by circumplanetary accretion, unlike the regular satellites that follow uninclined, nearly circular and prograde orbits.
Scott S. Sheppard, David C. Jewitt
exaly   +3 more sources

Black Rain: The Burial of the Galilean Satellites in Irregular Satellite Debris

Icarus, 2013
Abstract Irregular satellites are dormant comet-like bodies that reside on distant prograde and retrograde orbits around the giant planets. They are likely to be captured objects. Dynamical modeling work indicates they may have been caught during a violent reshuffling of the giant planets ∼4 Gy ago (Ga) as described by the so-called Nice model ...
Jeffrey M. Moore, William F. Bottke, David Nesvorný   +2 more
exaly   +2 more sources

The Irregular Satellites of Saturn

2018
With 38 known members, the outer or irregular moons constitute the largest group of satellites in the saturnian system. All but exceptionally big Phoebe were discovered between the years 2000 and 2007. Observations from the ground and from near-Earth space constrained the orbits and revealed their approximate sizes (~4 to ~40 km), low visible albedos ...
Denk, T., Mottola, S., Tosi, F., Bottke, W. F., Hamilton, Douglas R.   +4 more
openaire   +2 more sources

On the Inclination Distribution of the Jovian Irregular Satellites

Icarus, 2002
Irregular satellites—moons that occupy large orbits of significant eccentricity e and/or inclination I—circle each of the giant planets. The irregulars often extend close to the orbital stability limit, about 1/3–1/2 of the way to the edge of their planet's Hill sphere. The distant, elongated, and inclined orbits suggest capture, which presumably would
Phil Nicholson, Valerio Carruba, Joseph A. Burns   +2 more
exaly   +2 more sources

SATELLITE STUDIES OF ISOLATED IONOSPHERIC IRREGULARITIES

Canadian Journal of Physics, 1965
Ground-based observations of the radio signals propagated through the ionosphere from artificial satellites provide useful information about ionospheric irregularities. The technique has been extended to include recordings of the relative phase of the radio waves received at two stations as well as the customary amplitude recordings.
R. M. Turnbull, P. A. Forsyth
openaire   +1 more source

Irregular Fading of Satellite Transmissions

Nature, 1961
IN a paper by Kent1 it was stated that irregular fading of satellite transmissions on 40 Mc./s. from Sputnik 1 did not occur when the satellite was south of 50° N., and indeed was of very small amplitude on the average when the magnetic inclination at the sub-satellite point was less than 68°, the value at the observing station near Cambridge ...
openaire   +1 more source

Understanding Irregular Satellites

2016
Beginning with this Chapter, various observed phenomena due to the Lidov-Kozai effect in astronomical and astrophysical systems are considered. Historically, the first theoretical works on the effect by Lidov (Artif Satell Earth 8:5–45, 1961) were devoted to planetary satellites, both natural and artificial.
openaire   +1 more source

Ant Routing Algorithms for Irregular Satellite Constellations

2005
This paper shows a novel approach for routing datagrams in irregular satellite constellations, called Distributed Ant Routing (DAR). This approach belongs to the class of routing algorithms inspired by the behavior of the ant colonies in locating food and storing food.
ROSATI, LAURA, Berioli M., REALI, Gianluca   +2 more
openaire   +2 more sources