Results 61 to 70 of about 22,280 (246)

Calculation of the Uncertainties in the Planetary Precessions with the Recent EPM2017 Ephemerides and their Use in Fundamental Physics and Beyond

open access: yes, 2019
I tentatively compile the formal uncertainties in the secular rates of change of the orbital elements $a,~e,~I,~\Omega$ and $\varpi$ of the planets of the solar system from the recently released formal errors in $a$ and the nonsingular elements $h,~k,~p$
Iorio, Lorenzo
core   +1 more source

The perihelion precession of Saturn, planet X/Nemesis and MOND [PDF]

open access: yes, 2010
We show that the retrograde perihelion precession of Saturn \Delta\dot\varpi, recently estimated by different teams of astronomers by processing ranging data from the Cassini spacecraft and amounting to some milliarcseconds per century, can be explained ...
Iorio, Lorenzo
core   +1 more source

Premature Reentry of the Binar CubeSats Due To Underestimation of Solar and Geomagnetic Activities and Its Implication for Importance of Medium‐ and Long‐Term Space Weather Forecasts

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract The rapid development of low‐Earth orbit (LEO) satellites brings increased attention to spacecraft collisions, space debris, orbital decay, and satellite reentry. Neutral density and associated drag force on the satellite orbits elevate space risks, significantly determined by space weather disturbances, particularly geomagnetic storms.
Xin Wang   +9 more
wiley   +1 more source

Izračun položaja GPS-satelita iz podatkov preciznih efimerid : GPS-orbit computation from precise ephemeris data [PDF]

open access: yesGeodetski Vestnik, 2005
The article describes the theoretical point of view of the GPS precise ephemerides application that should be used in most precise GPS processing. Regarding broadcast, precise ephemerides allow us to achieve a much better accuracy of the final GPS ...
Bojan Stopar   +1 more
doaj  

Orbits of 6 binaries [PDF]

open access: yesSerbian Astronomical Journal, 2004
In this paper the orbits of binaries WDS 10093+2020 = A 2145, WDS 21074-0814 = BU 368 AB and WDS 22288-0001 = STF 2909 AB are recalculated because of significant deviations of more recent observations from the ephemerides. For binaries WDS 22384-0754 = A
Olević Dragomir M.   +1 more
doaj   +1 more source

Phenomenological constraints on Lemaitre-Tolman-Bondi cosmological inhomogeneities from solar system dynamics

open access: yes, 2010
We, first, analytically work out the long-term, i.e. averaged over one orbital revolution, perturbations on the orbit of a test particle moving in a local Fermi frame induced therein by the cosmological tidal effects of the inhomogeneous Lemaitre-Tolman ...
A. Fienga   +17 more
core   +1 more source

The Impact of the 2024 Mother's Day Storm on Aircraft Surveillance Across Europe

open access: yesSpace Weather, Volume 23, Issue 12, December 2025.
Abstract The Mother's day storm from 10–13 May 2024 is one of the most extreme space weather events recorded in recent decades and triggered a strong ionospheric response with various impacts on communication and navigation systems. In this study the impact on the aviation sector, and more specifically air traffic management, is investigated with ...
Erik Schmölter, Jens Berdermann
wiley   +1 more source

The lingering anomalous secular increase of the eccentricity of the orbit of the Moon: further attempts of explanation of cosmological origin

open access: yes, 2014
A new analysis of extended data records collected with the Lunar Laser Ranging (LLR) technique performed with improved tidal models was not able to resolve the issue of the anomalous rate $\dot e$ of the eccentricity $e$ of the orbit of the Moon, which ...
Iorio, Lorenzo
core   +2 more sources

Probing Jupiter's Atmosphere Through Juno Radio Occultations: Methodology and Initial Observations

open access: yesGeophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract This paper presents an analysis of Juno's first radio occultation experiments. Relying on two‐way radio links in the X‐ and Ka‐bands, we processed data from NASA's Deep Space Network antennas through a ray‐tracing inversion algorithm.
Andrea Caruso   +15 more
wiley   +1 more source

Magnetopause Reconnection Voltages During the Voyager 2 Flyby of Uranus

open access: yesGeophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Uranus' magnetosphere presents a unique system to examine global magnetic reconnection processes due to its location far from the Sun. We assess reconnection effectiveness during Voyager 2's Uranus flyby, using a physics‐based analytical model to calculate reconnection voltages applied to the magnetopause.
S. Zomerdijk‐Russell, J. M. Jasinski
wiley   +1 more source

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