Results 41 to 50 of about 10,252 (275)
Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]
Journal of Astronomy and Space Sciences, 2012 Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
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Mars moon ephemerides after 14 years of Mars Express data [PDF]
Astronomy & Astrophysics, 2020 The Mars Express (MEX) mission has been successfully operated around Mars since 2004. Among many results, MEX has provided some of the most accurate astrometric data of the two Mars moons, Phobos and Deimos.
V. Lainey +9 more
semanticscholar +1 more source
Effect of Ephemeris on Pulsar Timing and Navigation Accuracy Based on X-ray Pulsar Navigation-I Data
Universe, 2022 Solar system ephemeris is very important for pulsar timing and navigation. In order to explore the effect of different precision ephemerides on X-ray pulsar timing and navigation, the differences between timing and navigation results with four JPL ...
Yongtao Deng, Shuanggen Jin
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A Circular Restricted n-body Problem [PDF]
NEGRI, Rodolfo Batista; PRADO, Ant\^onio FBA. Circular Restricted
n-Body Problem. Journal of Guidance, Control, and Dynamics, v. 45, n. 7, p.
1357-1364, 2022, 2023 This paper introduces the Circular Restricted n-Body Problem (CRNBP), an extension of the bicircular restricted four-body problem (BCR4BP) designed to describe the dynamics of an n-body system. In the CRNBP, each massive body in the system is constrained to follow a Keplerian motion, similar to the BCR4BP's artificial constraint.
arxiv +1 more source
COMMISSION 4: EPHEMERIDES [PDF]
Proceedings of the International Astronomical Union, 2008 JPL planetary ephemeris development has been very active assimilating measurements from current planetary missions and supporting future missions. The NASA Mars Science Laboratory (MSL) mission with launch in 2009 requires knowledge of the Earth and Mars ephemerides with 30m accuracy. By comparison, the accuracy of the Mars ephemeris in the widely used
Toshio Fukushima +10 more
openaire +2 more sources
Maya records of planetary conjunctions in Dresden Codex [PDF]
Serbian Astronomical JournalOld Mayas designed a very complicated calendar, and they also recorded important historical events and astronomical phenomena. Dresden Codex (DC), one of the four preserved Mayan hieroglyphic literal legacies, contains many of these, covering ...
Vondrák J., Böhm V., Böhm B.
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Observational Data and Orbits of the Asteroids Discovered at the Baldone Observatory in 2008–2013
Open Astronomy, 2015 The paper presents statistics of the asteroids observed and discovered at the Baldone Observatory, Latvia, in 2008–2013 within the project for astrometric observations of the near-Earth objects (NEOs), the main belt asteroids and comets. CCD observations
Černis K., Wlodarczyk I., Eglitis I.
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PROGRAMS OF AES EPHEMERIDES CALCULATION
Odessa Astronomical Publications, 2017 A program of AES ephemerides calculation is developed which permits, from the given set of elemental orbit, to calculate ephemerides for several months’ period.
S. Ja. Kolesnik, N. G. Paltsev
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Aerotecnica Missili & Spazio, 2021 Jupiter and its moons are a complex dynamical system that include several phenomena like tides interactions, moon’s librations and resonances. One of the most interesting characteristics of the Jovian system is the presence of the Laplace resonance ...
A. Magnanini
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La propriété intellectuelle des calculs astronomiques en question
Philosophia Scientiæ, 2018 In 1885, the Bureau des longitudes (i.e., the French Board of longitude) had to adapt the ephemerides of the Connaissance des temps in order to answer the needs of the sailors.
Guy Boistel
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