Results 31 to 40 of about 6,728 (225)

Masses, bulk densities, and macroporosities of asteroids (15) Eunomia, (29) Amphitrite, (52) Europa, and (445) Edna based on Gaia astrometry [PDF]

, 2022
Context. Gaia Data Release 2 (DR2) includes milliarcsecond-accuracy astrometry for 14 099 asteroids. One of the main expected scientific applications of these data is asteroid mass estimation via the modeling of perturbations during asteroid-asteroid ...
Granvik, M., Siltala, L., L. Siltala, Siltala, L.,, M. Granvik, Granvik, Mikael,   +5 more
core   +1 more source

Radial Velocity Monitoring and Analysis of Gaia Astrometry of Selected Intermediate Mass Stars to Constrain Their Multiplicity Status

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT We present new radial velocity measurements of 13 selected intermediate mass stars (2–6 M⊙). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the échelle spectrograph FLECHAS. The radial velocity of eight stars was found to be constant during our spectroscopic monitoring, namely: 17
J. Bätz, M. Mugrauer, K.‐U. Michel, J. Reichert, A. Tschirschky, L. Pietsch, F. Edelmann, R. Neuhäuser   +7 more
wiley   +1 more source

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley   +1 more source

The Orbits of Uranus, Its Satellites and Rings, the Gravity Field of the Uranian System, and the Orientation of the Poles of Uranus and Its Satellites

The Astronomical Journal
R. A. Jacobson determined the orbits of the Uranian satellites, the masses of Uranus and its satellites, and the orientation of the pole of Uranus from Earth-based astrometry, Earth-based ring occultations, and observations acquired with the Voyager 2 ...
Robert A. Jacobson, Ryan S. Park
doaj   +1 more source

Optimizing image processing for modern wide field surveys: enhanced data management based on the LSST science pipelines

Frontiers in Astronomy and Space Sciences
Introduction: In recent decades, numerous large survey projects have been initiated to enhance our understanding of the cosmos. Among these, the Vera C.
Yuanyu Hong, Yuanyu Hong, Chao Yang, Chao Yang, Miaomiao Zhang, Yanpeng Chen, Yanpeng Chen, Binyang Liu   +7 more
doaj   +1 more source

Astrometry

, 2023
An introduction to how astrometric measurements are done with long-baseline optical interferometry, in single or dual-field, and in particular with the GRAVITY instrument.
openaire   +1 more source

Results of the astrometry and direct imaging testbed for exoplanet detection

, 2017
Measuring masses of long-period planets around F, G, and K stars is necessary to characterize exoplanets and assess their habitability. Imaging stellar astrometry offers a unique opportunity to solve radial velocity system inclination ambiguity and ...
Rodack, Alexander, Pluzhnik, Eugene A., Olivier Guyon, Milster, Thomas, Finan, Emily, Eugene A. Pluzhnik, Alexander Rodack, Eduardo A. Bendek, Belikov, Ruslan, Thomas Milster, Emily Finan, Justin Knight, Ruslan Belikov, Knight, Justin, Lee Johnson, Guyon, Olivier, Johnson, Lee, Bendek, Eduardo A.   +17 more
core   +1 more source

Payload Selection Scheme for a Fast‐Response Planetary Defense Scouting Mission: The Satis CubeSat Study

Advances in Astronomy, Volume 2026, Issue 1, 2026.
The continued detection of near‐Earth asteroids with postulated close encounters with Earth is a clear motivation for planetary defense–driven mission designs. Fast reconnaissance in an imminent threat scenario (i.e., less than a few years upon impact) is crucial to gain information about an asteroid potentially impacting the Earth in the near future ...
Markus Patzek, Birgit Ritter, Carsten Güttler, Moritz Goldmann, Özgür Karatekin, Detlef Koschny, Richard Moissl, Valerio Fogliano, Francisco Cabral, Roger Walker, Bastian Gundlach, Michael Kueppers   +11 more
wiley   +1 more source

24. Photographic Astrometry (Astrometrie Photographioue) [PDF]

Transactions of the International Astronomical Union, 1991
Despite some much publicized disappointments, the highlights of Astrometry during the past three year period are dominated by the successful launches of the ES A Hipparcos astrometric satellite and the NASA Hubble Space Telescope. For the past 15 to 20 years the research activities of many Commission members have been monopolized by the design and ...
openaire   +1 more source

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, Wenjing Jin, M. Crézé, P. D. Hemenway, I. I. Kumkova, I. K. Platais, S. Röser, C. Turon, J. J. Wang   +8 more
openaire   +1 more source