Results 41 to 50 of about 30,911 (193)

ELSA and the frontiers of astrometry

, 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
Brown, Anthony G. A.
core   +1 more source

VERA’s 20 yr Evolution in Science and Technology

Galaxies
We review the past 20 yr evolution of VERA (VLBI Exploration of Radio Astrometry) in both science and techinology. VERA is a VLBI array in Japan which consists of four 20 m-diameter telescopes, originally dedicated to phase-referencing VLBI astrometry ...
Mareki Honma, Tomoya Hirota, Tomoaki Oyama, Akiharu Nakagawa   +3 more
doaj   +1 more source

Al‐Khadhaf: The first camera‐observed (H5–6) meteorite fall from Oman

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 522-547, March 2026.
Abstract A fireball camera system installed in 2022 by the Oman Meteorite Monitoring Project (OMMP) as part of the Global Fireball Observatory (GFO) recorded a 3.2 s fireball on March 8, 2022 at 8:15 p.m. UTC. A meteoroid of 4 ± 2 kg entered the atmosphere at 14.0 km/s.
Anna Zappatini, Edwin Gnos, Beda A. Hofmann, Urs Eggenberger, Pascal M. Kruttasch, Frank Gfeller, Mohammad Tauseef, Ingo Leya, Hadrien A. R. Devillepoix, Eleanor K. Sansom, Martin Cupák, Sophie E. Deam, Thomas W. C. Stevenson, Peter Jenniskens, Sebastian Lindemann, Beat Booz, Muati. S. Al‐Muati, Abdulmunaim A. Al‐Zakwani, Hussain A. Al‐Ghafri   +18 more
wiley   +1 more source

A Refined Astrometric Approach Based on the Precision Premium and its Application to the Jupiter’s Satellite Himalia

The Astronomical Journal
Since the advent of Gaia catalog, positional precision of a ground-based telescope can be greatly improved by correction of more subtle errors, including positional biases induced by atmospheric turbulence, and some instrumental factors such as geometric
Z. J. Zheng, Q. Y. Peng, F. R. Lin, D. Li   +3 more
doaj   +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

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 Lost and Regained

Open Astronomy, 2011
Technological and scientific developments during the past century made a new branch of astronomy flourish, i.e. astrophysics, and resulted in our present deep understanding of the whole Universe.
Høg E.
doaj   +1 more source

On reference star recognition and identification

Geodesy and Cartography, 2014
The paper deals with a research in the area of automation of positional star observations. In order to fully employ recent progress in imaging technologies, star image recognition and reference star identification process should gain comparable level of ...
Ansis Zariņš, Inese Janpaule, Jānis Kaminskis   +2 more
doaj   +1 more source

A Novel Deep Learning-Based Relabeling Architecture for Space Objects Detection from Partially Annotated Astronomical Images

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, Bogdan Ceachi, Ciprian-Octavian Truică, Mihai Trăscău, Adina Magda Florea   +4 more
doaj   +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