Results 71 to 80 of about 3,755,242 (236)
Orbital Elements of Comet C/1490 Y1 and the Quadrantid shower
, 2009 The Quadrantid shower, one of the most intense showers, has been observed at the beginning of January each year. However, the origin of the meteors is still unknown.
Ahn +41 more
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Period Change of W UMa Type Contact Binary AB And [PDF]
Journal of Astronomy and Space Sciences, 1997 The CCD photometric observations of W UMa-type eclipsing binary AB And were made from September 1994 to October 1996. New four primary minimum times were obtained form these observations.
Ho Jin +4 more
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DOPPLER STATION FOR ORBITAL TRACKING OF LOW-ORBIT SPACECRAFTS BY THEIR RADIO BEACON SIGNALS
Odessa Astronomical Publications, 2018 A ground station of orbital tracking of low-orbit spacecrafts has been developed and tested in the RI "Mykolaiv Astronomical Observatory". The station uses the Doppler shift of frequencies of signals radiated by spacecraft radio beacons for their orbital
F. Bushuev +5 more
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Balancing the effects of solar radiation pressure on the orbital elements of a spacecraft using Lorentz force. [PDF]
Sci Rep, 2022 Yousef MA, El-Saftawy MI, Mostafa A.
europepmc +1 more source
Lower bounds of characteristic scale of topological modification of the Newtonian gravitation
, 2012 We analytically work out the long-term orbital perturbations induced by the first term of the expansion of the perturbing potential arising from the local modification of the Newton's inverse square law due to a topology R^2 x S^1 with a compactified ...
Floratos E., L. IORIO, Roy A. E.
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Physics OpenNew definitions of the effective nuclear charge are proposed to evaluate the orbital wave function and the dipole matrix element ⟨n,l|r|n′,l′⟩ for the non-hydrogenic atoms or ions.
Xiangdong Li +2 more
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Extended Kalman Filtering of Satellite Doppler Tracking Data and IT¡¯S Application to Orbit Determination Problems [PDF]
Journal of Astronomy and Space Sciences, 1995 Using a directional antenna, the Doppler effect of satellites can be detected and the orbital elements can be obtained by the Extended Kalman Filter with the observed frequency shift data. We obtained the orbital elements of NOAA-11 by the application of
Dong-Kyu Kim, Kyu-Hong Choi
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Odessa Astronomical Publications, 2018 Network of passive correlation ranging contains of five stations located in Ukraine and Latvia. It has been created at the initiative of the RI “Mykolaiv Astronomical Observatory” to have independent means to track the future Ukrainian geostationary ...
F. Bushuev +8 more
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Osculating orbits in Schwarzschild spacetime, with an application to extreme mass-ratio inspirals
, 2007 We present a method to integrate the equations of motion that govern bound, accelerated orbits in Schwarzschild spacetime. At each instant the true worldline is assumed to lie tangent to a reference geodesic, called an osculating orbit, such that the ...
A. Pound +10 more
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