Results 11 to 20 of about 24,888 (220)
The Perturbed Full Two-body Problem: Application to Post-DART Didymos
The Planetary Science Journal, 2023 With the successful impact of the NASA Double Asteroid Redirection Test (DART) spacecraft in the Didymos–Dimorphos binary asteroid system, we provide an initial analysis of the post-impact perturbed binary asteroid dynamics.
Alex J. Meyer +21 more
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Estimating masses of Keplerian disk systems: the case of AGN in NGC 4258 [PDF]
, 2012 The Keplerian motion of accretion disks in Active Galactic Nuclei (AGN) is usually believed to be generated by a heavy central mass. We investigate accreting disk systems with polytropic gas in Keplerian rotation and obtain a phenomenological formula ...
Mach, Patryk +2 more
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The Astrophysical Journal Letters, 2023 The very long-term evolution of the hierarchical restricted three-body problem with a slightly aligned precessing quadrupole potential is studied analytically.
Ygal Y. Klein, Boaz Katz
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Implications of kHz Quasi-Periodic Brightness Oscillations in X--Ray Binaries for Neutron Star Structure [PDF]
, 1998 Kilohertz quasi-periodic oscillations (QPOs) in low-mass X-ray binaries (LMXBs) may represent the orbital frequencies of the innermost Keplerian orbits around accreting neutron stars. Attempts have recently been made to derive constraints on the mass and
Andersson +25 more
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Timing models for the long-orbital period binary pulsar PSR B1259-63 [PDF]
, 1998 The pulsar PSR B1259-63 is in a highly eccentric 3.4-yr orbit with the Be star SS 2883. Timing observations of this pulsar, made over a 7-yr period using the Parkes 64-m radio telescope, cover two periastron passages, in 1990 August and 1994 January. The
Bailes, M. +5 more
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Proper Motion and Secular Variations of Keplerian Orbital Elements
Frontiers in Astronomy and Space Sciences, 2018 High-precision observations require accurate modeling of secular changes in the orbital elements in order to extrapolate measurements over long time intervals, and to detect deviation from pure Keplerian motion caused, for example, by other bodies or ...
Alexey G. Butkevich
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Strong-Field Gravity Tests with the Double Pulsar
Physical Review X, 2021 Continued timing observations of the double pulsar PSR J0737–3039A/B, which consists of two active radio pulsars (A and B) that orbit each other with a period of 2.45 h in a mildly eccentric (e=0.088) binary system, have led to large improvements in the ...
M. Kramer +29 more
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On the Eccentricity Distribution of Exoplanets from Radial Velocity Surveys [PDF]
, 2008 We investigate the estimation of orbital parameters by least-$\chi^2$ Keplerian fits to radial velocity (RV) data using synthetic data sets. We find that while the fitted period is fairly accurate, the best-fit eccentricity and $M_p\sin i$ are ...
Shen, Yue, Turner, Edwin L.
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Contributions to Geophysics and Geodesy, 2021 BeiDou Navigation Satellite System (BDS) is composed of satellites in geostationary Earth orbit (GEO), medium Earth orbit (MEO) and inclined geosynchronous orbit (IGSO). However, the orbit determination of geostationary Earth orbits and of geosynchronous
Radhika A. CHIPADE +1 more
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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 +2 more
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