Results 61 to 70 of about 24,888 (220)

Beyond Point Masses. III. Detecting Haumea’s Nonspherical Gravitational Field

The Planetary Science Journal
The dwarf planet Haumea is one of the most compelling trans-Neptunian objects to study, hosting two small, dynamically interacting satellites, a family of nearby spectrally unique objects, and a ring system. Haumea itself is extremely oblate due to its 3.
Benjamin C. N. Proudfoot, Darin A. Ragozzine, William Giforos, Will M. Grundy, Mariah MacDonald, William J. Oldroyd   +5 more
doaj   +1 more source

Detecting the spin-orbit misalignment of the super-Earth 55 Cnc e [PDF]

, 2014
We present time-resolved spectroscopy of transits of the super-Earth 55 Cnc e using HARPS-N observations. We devised an empirical correction for the "color effect" affecting the radial velocity residuals from the Keplerian fit, which significantly ...
Bourrier, Vincent, Hébrard, Guillaume
core   +1 more source

Data‐Driven Satellite Drag Modeling Without Dynamic Knowledge of the Atmosphere

Space Weather, Volume 24, Issue 2, February 2026.
Abstract Increasing congestion in low Earth orbit (LEO) from new satellite deployments and a growing debris population has made accurate orbital trajectory prediction essential for anticipating and avoiding potential collisions on a regular basis. Atmospheric drag is usually the dominant source of propagation error across much of LEO, especially during
William E. Parker, Richard Linares
wiley   +1 more source

Orbit Rendezvous Maneuvers in Cislunar Space via Nonlinear Hybrid Predictive Control

Dynamics
The NASA’s Artemis project intends to bring humans back to the Moon in the next decade. A key element of the project will be the Lunar Gateway, a space station placed in a peculiar, near rectilinear Halo orbit in the vicinity of a collinear libration ...
Dario Sanna, David Paolo Madonna, Mauro Pontani, Paolo Gasbarri   +3 more
doaj   +1 more source

Evolution of the rotational motion of a viscoelastic planet with a core on an elliptical orbit

Российский технологический журнал, 2021
The work is devoted to the study of the evolution of the rotational motion of a planet in the central Newtonian field of forces. The planet is modeled by a body consisting of a solid core and a viscoelastic shell rigidly attached to it.
A. A. Shatina, A. V. Starostina
doaj   +1 more source

Bound on the Dark Matter Density in the Solar System from Planetary Motions [PDF]

, 2007
High precision planet orbital data extracted from direct observation, spacecraft explorations and laser ranging techniques enable to put a strong constraint on the maximal dark matter density of a spherical halo centered around the Sun.
E. M. Standish, F. Zwicky, F.-S. Ling, G. Vertongen, J.-M. Frère, L. D. Landau, R. A. Jacobson   +6 more
core   +2 more sources

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

On the Double Planet System Around HD 83443 [PDF]

, 2002
The Geneva group has reported two Saturn-mass planets orbiting HD 83443 (K0V) with periods of 2.98 and 29.8 d. The two planets have raised interest in their dynamics because of the possible 10:1 orbital resonance and the strong gravitational interactions.
Alan J. Penny, Brad D. Carter, C. G. Tinney, Chris McCarthy, Delfosse X., Diego F., Geoffrey W. Marcy, Hugh R. A. Jones, Kevin Apps, Kurster M., Perryman M. A. C., Queloz D., R. Paul Butler, Santos N. C., Santos N. C., Steven S. Vogt, Tinney C. G., Udry S., Vogt S. S.   +18 more
core   +2 more sources

Mobility Management for the Low‐Altitude Economy: Latency‐Aware Handover Design

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper develops a latency‐aware mobility‐management framework for aerial vehicles operating in hybrid terrestrial non‐terrestrial networks. We formulate a MILP for optimal AV AP association and propose a greedy handover policy using predicted coverage, rate and handover latency.
Navid Heydarishahreza, Tao Han, Nirwan Ansari   +2 more
wiley   +1 more source

Gravitational Ionization: Periodic Orbits of Binary Systems Perturbed by Gravitational Radiation [PDF]

, 1995
The long term perturbation of a Newtonian binary system by an incident gravitational wave is discussed in connection with the issue of gravitational ionization.
Chicone, C., Mashhoon, B., Retzloff, D.
core   +2 more sources