Results 31 to 40 of about 31,207 (206)

Astrometry with the Keck-Interferometer: the ASTRA project and its science

, 2008
The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and concepts of the upgrade are presented.
Andrea M. Ghez, Andrew Cooper, Ben Berkey, Bill Randolph, Boden, Bouchez, Brett Smith, Colavita, Colavita, Colavita, Colette Tyau, Delplancke, Douglas Morrison, Drew Medeiros, Ed Wetherell, Eisner, Eliot Quataert, Esposito, Ghez, Ghez, Gillessen, Gilmozzi, Haniff, James R. Graham, John Monnier, Jorg-Uwe Pott, Josh A. Eisner, Julien Woillez, Kellee Summers, Kevin Tsubota, Labeyrie, Lynne Hillenbrand, Mark M. Colavita, Michael Hrynewych, Monnier, Nevin Weinberg, Peter L. Wizinowich, Pott, Rachel L. Akeson, Rafael Millan-Gabet, Santos, Shao, Tatyana Panteleeva, Vasisht, Weigelt   +44 more
core   +1 more source

Gaia: The Astrometry Revolution [PDF]

, 2015
The power of micro-arcsecond ($\mu$as) astrometry is about to be unleashed. ESA's Gaia mission, now headed towards the end of the first year of routine science operations, will soon fulfil its promise for revolutionary science in countless aspects of ...
Bonavita, M., Desidera, S., Gratton, R., Lattanzi, M. G., Sozzetti, A.   +4 more
core   +2 more sources

COMMISSION 8: ASTROMETRY [PDF]

Proceedings of the International Astronomical Union, 2011
Gaia is continuing well with its development and construction and is expected to achieve parallax accuracies of about 10 to 300 μas for 6 to 20 mag. It is scheduled to launch in 2013. The ICRF2 was adopted by the IAU in 2009 as the new fundamental celestial reference frame.
Evans, Dafydd W., Zacharias, Norbert, Kumkova, Irina, Andrei, Alexandre Humberto, Brown, Anthony, Gouda, Naoteru, Popescu, Petre, Souchay, Jean, Unwin, Stephen C., Zhu, Z.   +9 more
openaire   +2 more sources

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

Gaia: Organisation and challenges for the data processing [PDF]

, 2007
Gaia is an ambitious space astrometry mission of ESA with a main objective to map the sky in astrometry and photometry down to a magnitude 20 by the end of the next decade.
Bailer-Jones, C., Bastian, U., Drimmel, R., Eyer, L., Katz, D., Luri, X., Mignard, F., O'Mullane, W., Passot, X., Pourbaix, D., Prusti, T., van Leeuwen, F.   +11 more
core   +4 more sources

Exploring the Interior Structure of (16) Psyche Through Basin‐Scale Collisions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Asteroid (16) Psyche, the largest member of the M/X‐type asteroids, may be the leftover core of a differentiated planetesimal. As such (16) Psyche will be explored in detail by NASA's discovery‐class Psyche mission in 2029. This will be the first mission to orbit a metal‐rich asteroid, or any asteroid in the 100–500 km size range.
Namya Baijal, Erik Asphaug, C. Adeene Denton, Martin Jutzi, Sabina Raducan, Saverio Cambioni, Linda T. Elkins‐Tanton, Amanda Alexander   +7 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

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

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

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
doaj   +1 more source

Simultaneous Exoplanet Characterization and deep wide-field imaging with a diffractive pupil telescope

, 2013
High-precision astrometry can identify exoplanets and measure their orbits and masses, while coronagraphic imaging enables detailed characterization of their physical properties and atmospheric compositions through spectroscopy.
Ammons, Stephen M., Angel, Roger, Belikov, Ruslan, Bendek, Eduardo A., Eisner, Josh A., Guyon, Olivier, Levine, Marie, Martinache, Frantz, Milster, Thomas D., Nemati, Bijan, Pitman, Joe, Shaklan, Stuart, Shao, Michael, Woodruff, Robert A., Woolf, Neville J.   +14 more
core   +3 more sources