A global space astrometry mission, Gaia is building the largest, most precise three-dimensional map of our Galaxy by surveying nearly two billion objects. Mission Throughout the course of its mission, Gaia monitors each of its target stars about 14 times per year.

2019年9月1日 · Astrometry with Gaia Measuring the trigonometric parallax for a star yields the only fully reliable way of measuring distances in the local Universe. Some of the earliest recorded astrometry measurements date back more than 2000 years.

Since mid-2014, Gaia has been performing micro-arcsecond (μas) global astrometry for nearly ~2,000 million stars down to G ≈ 20.7 mag by linking objects with both small and large angular separations in a network in which each object is connected to …

Astronomers have pondered for years why our galaxy, the Milky Way, is warped. Data from ESA's star-mapping satellite Gaia suggest the distortion might be caused by an ongoing collision with another, smaller, galaxy, which sends ripples through …

Gaia's astrometric measurements are made using the global astrometry concept successfully demonstrated by Hipparcos. Gaia measures the relative separations of the thousands of stars simultaneously present in the combined fields of view.

Details on Gaia FPR products . Astrometry and photometry from engineering images taken in the Omega Centauri region. Sources based on Service Interface Function (SIF) images of very dense regions in the sky. These sources build an add-on catalogue to the nominal Gaia catalogue. Nominal and SIF detections were not mixed to create these sources.

Key words: Gaia; Astrometry; parallax; accuracy; cali-bration. 1. GAIA COMPARED WITH HIPPARCOS The goals of Gaia in terms of astrometric measurements are well known (Mignard 2005; de Bruijne 2005): a com-plete sky survey of point sources to 20 mag (»1 billion objects) with a target accuracy in parallax of »4 „as

2023年10月10日 · With Gaia’s Focused Product Release, updated astrometry is published for the same set of asteroids. The orbit precision for the solar system objects in Gaia FPR is on average 20 times better compared to Gaia DR3.

ESA Gaia Archive. Access all public data generated by the ESA mission to chart a three-dimensional map of our Galaxy.

2020年12月3日 · Gaia EDR3 passbands describe the photometric system for Gaia Early Data Release 3, they can be found here. Both Gaia DR1 and Gaia DR2 comes with their own set of passbands. Documentation . Data release documentation is provided along with each data release in the form of a downloadable PDF and a webpage.