Results 51 to 60 of about 3,755,242 (236)

Constraining the orbits of sub-stellar companions imaged over short orbital arcs [PDF]

, 2015
Imaging a star's companion at multiple epochs over a short orbital arc provides only four of the six coordinates required for a unique orbital solution. Probability distributions of possible solutions are commonly generated by Monte Carlo (MCMC) analysis,
Kennedy, Grant M., Pearce, Tim D., Wyatt, Mark C.   +2 more
core   +1 more source

Effect of nonsymmorphic space group on correlation functions in iron-based superconductors

, 2017
The orbital basis is natural when one needs to calculate the effect of local interactions or to unravel the role of orbital physics in the response to external probes. In systems with nonsymmorphic point groups, such as the iron-based superconductors, we
Nourafkan, R., Tremblay, A. -M. S.
core   +1 more source

Spectroscopic binaries among Hipparcos M giants III. The eccentricity-period diagram and mass-transfer signatures

, 2009
This paper is the third one in a series devoted to studying the properties of binaries involving M giants. We use a new set of orbits to construct the first (e-logP) diagram of an extensive sample of M giant binaries, to obtain their mass-function ...
A. Frankowski, A. Jorissen, Adelman, Alcock, Alvarez, Artymowicz, Ayres, B. Famaey, Bakker, Barnes, Belczynski, Benz, Bessell, Bessell, Blöcker, Boffin, Charbonnel, de Ruyter, Derekas, Dumm, Duquennoy, Edvardsson, Eggleton, Famaey, Famaey, Fekel, Frankowski, Frankowski, Goldin, Goriely, Herman, Hinkle, Humphreys, Hut, Hünsch, Iben, Jancart, Jorissen, Jorissen, Jorissen, Jorissen, Jura, Jura, Kippenhahn, Lebzelter, Lewis, Little, Lucke, Lü, McClure, McClure, McNamara, Mermilliod, Mermilliod, Nelson, North, Otero, Paczynski, Pastetter, Podsiadlowski, Pourbaix, Ragland, Reimers, Reimers, Reyniers, Richichi, Richichi, Royer, S. Van Eck, Samus, Schaller, Schmid, Schwarz, Sivarani, Skopal, Smiljanic, Soker, Soszynski, Soszynski, Tomkin, Torres, Van Eck, Van Eck, Van Winckel, Van Winckel, Verhoelst, Welty, Wheatley, Whitelock, Whitelock, Wood, Zahn, Zamanov   +92 more
core   +1 more source

Four years' interferometric observations of Galactic binary Cepheids [PDF]

, 2017
We give an update on our long-term program of Galactic Cepheids started in 2012, whose goal is to measure the visual orbits of Cepheid companions. Using the VLTI/PIONIER and CHARA/MIRC instruments, we have now detected several com- panions, and we ...
Evans, N. R., Gallenne, A., Gieren, W., Kervella, P., Merand, A., Pietrzynski, G., Profitt, C.   +6 more
core   +1 more source

Numerical modelling of major planets movement on the new interaction principle basis

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
Numerical integration of the equations of movement of major planets, on the basis of a new principle of interaction is spent. Elements of orbits of major planets on large time interval (1602-2200) are calculated. Results of calculations are compared with
Anatolii F Zausaev
doaj  

Mean Orbital Elements for Geosynchronous Orbit - I - Semi-major, eccentricity, and longitude of perigee [PDF]

Journal of Astronomy and Space Sciences, 1989
The mean orbital elements for geosynchronous satellite are developed in terms of non-singular orbital elements. The true satellite position oscillates about the position calculated from the mean elements due to short period perturbations to the satellite
Kyu-Hong Choi, Jeong-Sook Lee, Jong-Uk Park, In-Sang Moon   +3 more
doaj  

Orbital estimation of spacecraft under unknown low-thrust acceleration (First report: estimation of mean orbital elements)

Nihon Kikai Gakkai ronbunshu, 2015
Space Situational Awareness (SSA) has been recognized to be important for safe space activities. As low-thrust propulsion technology becomes increasingly popular, SSA for low-thrust spacecraft may become an area of increasing interest.
Naoki DATE, Mai BANDO, Shinji HOKAMOTO
doaj   +1 more source

Orbital Elements Evolution Due to a Perturbing Body in an Inclined Elliptical Orbit

, 2014
Kozai developed the secular and long period terms of the disturbing function due to lunisolar perturbations in terms of the orbital elements of a satellite, the Sun and the Moon, and applied those secular perturbations to asteroids with high inclination ...
W. A. Rahoma
semanticscholar   +1 more source

Orbits for sixteen binaries [PDF]

Serbian Astronomical Journal, 2006
In this paper orbits for 13 binaries are recalculated and presented. The reason is that recent observations show higher residuals than the corresponding ephemerides calculated by using the orbital elements given in the Sixth Catalog of Orbits of Visual ...
Cvetković Z., Novaković B.
doaj   +1 more source

THE METHOD FOR FAST DETERMINATION OF GEOSTATIONARY ARTH SATELLITE ORBIT FROM ANGULAR COORDINATES MEASUREMENTS

Odessa Astronomical Publications, 2017
Classical Laplas method for determination of Keplerian orbital elements is described. The values obtained are improved by the method of differential corrections.
O. A. Bazyey, E. S. Sibiryakova, A. V. Shulga   +2 more
doaj   +1 more source