Results 141 to 150 of about 41,651 (296)
Symposium - International Astronomical Union, 1994 VLBI is at present the most accurate technique for measuring radiosource positions and the only method capable of high precision for a reasonable number of sources. The applications of VLBI astrometry in stellar, Galactic and extra-Galactic regimes are reviewed.
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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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Astrometric detection of exoplanets from the ground
, 2013 Astrometry is a powerful technique to study the populations of extrasolar planets around nearby stars. It gives access to a unique parameter space and is therefore required for obtaining a comprehensive picture of the properties, abundances, and ...
Lazorenko, P. F. +5 more
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Modern techniques for making cometary astrometric observations, reducing these observations, using accurate reference star catalogs, and computing precise orbits and ephemerides are discussed in detail and recommendations and suggestions are given in ...
Harrington, R. S. +3 more
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Vienna VLBI and Satellite Software (VieVS) for Geodesy and Astrometry
, 2018 The Vienna VLBI and Satellite Software (VieVS) is state-of-the-art Very Long Baseline Interferometry (VLBI) analysis software for geodesy and astrometry.
J. Böhm +13 more
semanticscholar +1 more source
VieSched++: A New VLBI Scheduling Software for Geodesy and Astrometry
Publications of the Astronomical Society of the Pacific, 2019 We present a new Very Long Baseline Interferometry (VLBI) scheduling software called VieSched++, which is a stand-alone tool of the Vienna VLBI and Satellite Software (VieVS).
M. Schartner, J. Böhm
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Astrometry with Schmidt Telescopes [PDF]
International Astronomical Union Colloquium, 1984 Photographic astrometry, including work with Schmidt telescopes, can be divided into two main fields, (i) the measurement of positions of objects relative to a reference frame of stars with known celestial coordinates, and (ii) the measurement of relative proper motions and trigonometric parallaxes from a series of plates taken on the same field.
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Multi-wavelength differential astrometry of the S5 polar cap sample
, 2004 We report on the status of our S5 polar cap astrometry program. Since 1997 we have observed all the 13 radio sources of the complete S5 polar cap sample at the wavelengths of 3.6 cm, 2 cm and 7 mm. Images of the radio sources at 3.6 and 2 cm have already
Guirado, J. C. +4 more
core
Discovery, Observational Data and the Orbit of the Amor Group Asteroid 2010 BT3
Open Astronomy, 2012 A project devoted to astrometric and photometric observations of asteroids at the Molėtai Observatory is described. One of its most important results is the discovery of the asteroid 2010 BT3 belonging to the Amor group of the near-Earth objects.
Černis K. +3 more
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Symposium - International Astronomical Union, 1981 The 35-km interferometer at NRAO was used at 2.7 GHz during 1974–1979 to determine pulsar proper motions. Observations from each epoch were reduced to pseudo-position vector offsets which include both unknown, and constant, absolute position errors for the pulsars and their reference sources, as well as the time-varying proper motion of the pulsars ...
D. C. Backer, R. A. Sramek
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