Results 11 to 20 of about 4,904 (168)

The Future of Astrometry in Space

open access: yesFrontiers in Astronomy and Space Sciences, 2018
This contribution focuses on the importance of astrometry and on its future developments. Over the centuries astrometry has greatly contributed to the advance of the knowledge of the Universe.
Antonella Vallenari
doaj   +1 more source

Photographic zenith tubes observations to improve HIPPARCOS proper motion in declination of some stars [PDF]

open access: yesSerbian 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.
doaj   +1 more source

Digitization of the Belgrade Astronomical Observatory's vertical circle observational heritage [PDF]

open access: yesSerbian Astronomical Journal, 2018
The aim of the paper is to present the digitization of the results of last observations of bright stars made by the Belgrade vertical circle ASKANIA N±80118 (D = 190 mm, f = 2578 mm) at the Astronomical Observatory of Belgrade.
Šegan S., Šegan-Radonjić M.
doaj   +1 more source

Observational data and orbits of the asteroids discovered at the Baldone Observatory in 2015–2018

open access: yesOpen Astronomy, 2020
This paper is devoted to the discovery of 37 asteroids at the Baldone Astrophysical Observatory (MPC 069) from 2015 to 2018, and one of dynamically interesting Mars-crosser (MC) observed at the Baldone Astrophysical Observatory, namely 2008 LX16.
Wlodarczyk Ireneusz   +2 more
doaj   +1 more source

Dynamics of the December 2020 Ash‐Poor Plume Formed by Lava‐Water Interaction at the Summit of Kīlauea Volcano, Hawaiʻi

open access: yesGeochemistry, 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
doaj   +1 more source

Recovery of Asteroids from Observations of Too-Short Arcs by Triangulating Their Admissible Regions

open access: yesJournal of Astronomy and Space Sciences, 2021
The data set collected during the night of the discovery of a minor body constitutes a too-short arc (TSA), resulting in failure of the differential correction procedure.
Daniela Espitia   +2 more
doaj   +1 more source

Observational data and orbits of the comets discovered at the Vilnius Observatory in 1980–2006 and the case of the comet 322P

open access: yesOpen 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
doaj   +1 more source

Milky Way Star Clusters and Gaia: A Review of the Ongoing Revolution

open access: yesUniverse, 2022
The unprecedented quality of the astrometric measurements obtained with the ESA Gaia spacecraft have initiated a revolution in Milky Way astronomy. Studies of star clusters in particular have been transformed by the precise proper motions and parallaxes ...
Tristan Cantat-Gaudin
doaj   +1 more source

Determination of Orbital Elements and Ephemerides using the Geocentric Laplace’s Method

open access: yesJournal 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
doaj   +1 more source

Simulation study of asteroid mass determination using CSST asteroid observations

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The objective of this study is to explore the potential of the Chinese Space Station Telescope (CSST) in asteroid mass determination with asteroid-asteroid close encounters.
Fan Li   +4 more
doaj   +1 more source

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