Results 1 to 10 of about 15,248 (260)
Masses, bulk densities, and macroporosities of asteroids (15) Eunomia, (29) Amphitrite, (52) Europa, and (445) Edna based on Gaia astrometry [PDF]
A&A 658, A65 (2022), 2021 Gaia Data Release 2 (DR2) includes milliarcsecond-accuracy astrometry for 14,099 asteroids. We explore the practical impact of this data for the purpose of asteroid mass and orbit estimation by estimating the masses individually for four large asteroids. We use various combinations of Gaia astrometry and/or Earth-based astrometry so as to determine the
L. Siltala, M. Granvik
arxiv +3 more sources
Microarcsecond Astrometry: Science Highlights from Gaia [PDF]
Annual Review of Astronomy and Astrophysics, Vol. 59, 2021,
pp:59-115, 2021 Access to microarcsecond astrometry is now routine in the radio, infrared, and optical domains. In particular the publication of the second data release from the Gaia mission made it possible for every astronomer to work with easily accessible, high-precision astrometry for 1.7 billion sources to 21st magnitude over the full sky.
Anthony G. A. Brown
arxiv +3 more sources
Planetary and Space Science, 2023 PRAIA - Package for the Reduction of Astronomical Images Automatically - is a suite of astrometric and photometric tasks designed to cope with huge amounts of heterogeneous observations with fast processing, no human intervention, minimum parametrization and yet maximum possible accuracy and precision.
arxiv +3 more sources
The Future of Astrometry in Space [PDF]
Frontiers 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 +5 more sources
Precise radio astrometry and new developments for the next generation of instruments [PDF]
, 2020 We present a technique-led review of the progression of precise radio astrometry, from the first demonstrations, half a century ago, until to date and into the future. We cover the developments that have been fundamental to allow high accuracy and precision astrometry to be regularly achieved. We review the opportunities provided by the next-generation
M. Rioja, R. Dodson
arxiv +2 more sources
Stingray Sensor System for Persistent Survey of the GEO Belt. [PDF]
Sensors (Basel)The Stingray sensor system is a 15-camera optical array dedicated to the nightly astrometric and photometric survey of the geosynchronous Earth orbit (GEO) belt visible above Tucson, Arizona.
Campbell T +6 more
europepmc +2 more sources
Astrometry of circumstellar masers [PDF]
, 2002 The circumstellar masers around evolved stars offer an interesting possibility to measure stellar parameters through VLBI astrometry. In this paper the application of this technique is discussed, including the accuracy and the uncertainties of the method.
Wouter Vlemmings, H. J. van Langevelde
arxiv +5 more sources
Halometry from astrometry [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 Halometry---mapping out the spectrum, location, and kinematics of nonluminous structures inside the Galactic halo---can be realized via variable weak gravitational lensing of the apparent motions of stars and other luminous background sources. Modern astrometric surveys provide unprecedented positional precision along with a leap in the number of ...
Neal Weiner +2 more
openaire +5 more sources
Commission 24: Photographic Astrometry: (Astrometrie Photographique) [PDF]
Transactions of the International Astronomical Union, 2000 The scope of scientific interests of about 130 Commission members is much more complex than one may expect from the title of the commission. Besides traditional topics like the compilation of astrometric catalogues and the construction of an inertial reference system, more and more investigations performed by our members have been dedicated to the ...
E. Schilbach +8 more
openalex +3 more sources
ELSA and the frontiers of astrometry [PDF]
EAS Publications Series, 2010 ELSA stands for the ambitious goal of `European Leadership in Space Astrometry'. In this closing contribution I will examine how the ELSA network has advanced this goal. I also look ahead to the time when the Gaia data will be published and consider what needs to be done to maintain European leadership.
arxiv +6 more sources