Results 11 to 20 of about 4,968 (216)
Aerospace, 2022 Space Surveillance and Tracking is a task that requires the development of systems that can accurately discriminate between natural and man-made objects that orbit around Earth.
Florin Dumitrescu +4 more
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SST Anywhere—A Portable Solution for Wide Field Low Earth Orbit Surveillance
Remote Sensing, 2022 The low-Earth orbit (LEO) is filled with active satellites, but also with space debris, which need constant observation. The orbiting objects may be affected by collisions or by atmospheric drag, and therefore they can change their orbit or even fall to ...
Radu Gabriel Danescu +4 more
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Astrometry in the Future [PDF]
CELESTIAL MECHANICS AND DYNAMICAL ASTRONOMY, 1997 AbstractThe introduction of the extragalactic reference frame and the availability of the Hipparcos and Tycho catalogs will have major impacts on changing the accuracy levels of astrometry in the future.There is a need for accurate densification of the reference frames down to at least 20thmagnitude.
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Open Astronomy, 2022 This article is devoted to the discovery of comets at the Vilnius Observatory together with the orbital analysis of dynamically interesting comets, namely 322P. We studied the orbital evolution of comet 322P with and without non-gravitational effects. It
Włodarczyk Ireneusz, Černis Kazimieras
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Commission 8: Astrometry [PDF]
Proceedings of the International Astronomical Union, 2005 AbstractThis triennial report from Commission 8 covers astrometry-related matters for objects ranging from Solar system bodies out to Milky Way stars and QSOs at cosmological distances. This enormous range of distances is needed to establish, maintain, and improve the metric of the visible Universe--a very challenging effort since everything is moving.
Platais, Imants +9 more
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Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method
Journal of Astronomy and Space Sciences, 2020 This paper presents a methodology for Initial Orbit Determination (IOD) based on a modification of the Laplace’s geocentric method. The orbital elements for Near-Earth asteroids (1864) Daedalus, 2003 GW, 2019 JA8, a Hungaria-type asteroid (4690 ...
Daniela Espitia +2 more
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Geochemistry, Geophysics, Geosystems, 2023 On 20 December 2020, after more than 2 years of quiescence at Kīlauea Volcano, Hawaiʻi, renewed volcanic activity in the summit crater caused boiling of the water lake over a period of ∼90 min. The resulting water‐rich, electrified plume rose to 11–13 km
Ryan C. Cahalan +11 more
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The history of astrometry [PDF]
The European Physical Journal H, 2012 The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical observations more than two thousand years ago, and extending to the high accuracy observations being made from space today.
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Photographic zenith tubes observations to improve HIPPARCOS proper motion in declination of some stars [PDF]
Serbian Astronomical Journal, 2005 A procedure of calculation and results of an attempt to improve proper motions in declination for some HIPPARCOS stars are presented. A long series of optical observations of these stars observed with Photographic Zenith Tubes (PZT) are used.
Damljanović Goran M.
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Space astrometry with the Joint Milliarcsecond Astrometry Pathfinder [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe Joint Milliarcsecond Astrometry Pathfinder Survey (JMAPS) is a small, space-based, all sky, visible wavelength, astrometric and photometric survey mission for 0ththrough 14thI-band magnitude stars with a planned 2013 launch. The primary objective of the JMAPS mission is the generation of an astrometric star catalog with 1 milliarcsecond ...
Ralph A. Gaume, Gregory S. Hennessy
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