Results 61 to 70 of about 3,755,242 (236)

Hipparcos preliminary astrometric masses for the two close-in companions to HD 131664 and HD 43848. A brown dwarf and a low mass star

, 2009
[abridged] We attempt to improve on the characterization of the properties (orbital elements, masses) of two Doppler-detected sub-stellar companions to the nearby G dwarfs HD 131664 and HD 43848. We carry out orbital fits to the Hipparcos IAD for the two
Desidera, S., Sozzetti, A.
core   +1 more source

Multiconfigurational nature of 5f orbitals in uranium and plutonium intermetallics

, 2012
Uranium and plutonium's 5f electrons are tenuously poised between strongly bonding with ligand spd-states and residing close to the nucleus. The unusual properties of these elements and their compounds (eg.
Bauer, C. H. Booth, Conradson, D. L. Wang, D. Nordlund, D. Sokaras, Dallera, E. D. Bauer, J. L. Sarrao, J. N. Mitchell, Lashley, Lawrence, M. A. Torrez, M. A. Wall, P. G. Allen, P. H. Tobash, Palstra, Sarrao, Sato, Shim, T.- C. Weng, Y. Jiang   +21 more
core   +1 more source

New Symbiotic Stars Monitored with the Hermes Spectrograph: A Case Study of Orbital Hα Modulation

Open Astronomy, 2012
We present new orbital elements for two symbiotic systems involving a giant of spectral type S, namely V420 Hya and ER Del. These orbital elements are compared with existing elements for S-type binaries and for symbiotic binaries with M-giant primaries ...
Jorissen Alain, Van Eck S., Dermine T., Van Winckel H., Gorlova N.   +4 more
doaj   +1 more source

Orbital elements of barium stars formed through a wind accretion scenario [PDF]

, 2000
Taking the total angular momentum conservation in place of the tangential momentum conservation, and considering the square and higher power terms of orbital eccentricity e, the changes of orbital elements of binaries are calculated for wind accretion ...
Liang, Y. C., Liu, J. H., Peng, Q. H., Zhang, B.   +3 more
core   +1 more source

Orbital flips in hierarchical triple systems: relativistic effects and third-body effects to hexadecapole order

, 2017
We analyze the secular evolution of hierarchical triple systems in the post-Newtonian approximation to general relativity. We expand the Newtonian three-body equations of motion in powers of the ratio $a/A$, where $a$ and $A$ are the semimajor axis of ...
Will, Clifford M.
core   +2 more sources

Orbital Elements Ephemerides and Interfaces Design of LEO Satellites [PDF]

Journal of Geodesy and Geoinformation Science, 2019
Low earth orbit satellites, with unique advantages, are prosperous types of navigation augmentation satellites for the GNSS satellites constellations. The broadcast ephemeris element needs to be designed as an important index of the augmented LEOs.
Shanchuan FANG,Lan DU,Yunpeng GAO,Peiyuan ZHOU,Zejun LIU
doaj   +1 more source

Automatic correction of orbital elements using continuous thrust controlled in closed loop

, 2013
This work aims to study and simulate the control of a spacecraft trajectory in order to correct automatically and simultaneously the orbital elements that define the orbit: semi-major axis, eccentricity, periapse argument, inclination and right ascension
E. Rocco
semanticscholar   +1 more source

Orbital Optimization in the Active Space Decomposition Model

, 2015
We report the derivation and implementation of orbital optimization algorithms for the active space decomposition (ASD) model, which are extensions of complete active space self-consistent field (CASSCF) and its occupation-restricted variants in the ...
Kim, Inkoo, Parker, Shane M., Shiozaki, Toru   +2 more
core   +2 more sources

The theory of canonical perturbations applied to attitude dynamics and to the Earth rotation. Osculating and nonosculating Andoyer variables

, 2007
The Hamiltonian theory of Earth rotation, known as the Kinoshita-Souchay theory, operates with nonosculating Andoyer elements. This situation parallels a similar phenomenon that often happens (but seldom gets noticed) in orbital dynamics, when the ...
A. Deprit, A. Deprit, A. Escapa, A. Escapa, Alberto Escapa, D. Boccaletti, D. Brouwer, E. Mysen, E. Mysen, F. Tisserand, G.-I. Hori, G.E.O. Giacaglia, H. Andoyer, H. Goldstein, H. Kinoshita, H. Kinoshita, H. Kinoshita, H. Kinoshita, H.C. Plummer, J. Getino, J. Getino, J. Laskar, J. Souchay, J. Touma, J. Touma, J.A. Serret, J.H. Lieske, J.L. Synge, K. Abdullah, K.U. Schreiber, L. Petrov, M. Efroimsky, M. Efroimsky, M. Efroimsky, M. Efroimsky, M. Zanardi, Michael Efroimsky, P. Goldreich, S.J. Peale, S.J. Peale, T. Fukushima   +40 more
core   +1 more source

Phase Functions and Light Curves of Wide Separation Extrasolar Giant Planets

, 2005
We calculate self-consistent extrasolar giant planet (EGP) phase functions and light curves for orbital distances ranging from 0.2 AU to 15 AU. We explore the dependence on wavelength, cloud condensation, and Keplerian orbital elements.
Adam Burrows, Aigen Li, David Sudarsky, Deirmendjian D., Ivan Hubeny, Li A., Martonchik J. V., Queloz D. M., Thorpe T. E., Trauger J., Trauger J., Warren S. G.   +11 more
core   +1 more source