Gaia DR3 (gaiadr3)


The Gaia Early Data Release 3 (Gaia (E)DR3) enhances the DR2 catalogs by 118.79 million objects. It includes five-parameter astrometric solutions – positions on the sky, parallaxes, and proper motions – for more than 585 million sources, an additional pseudo-colour parameter for 800 million further sources (called six-parameter solution), and an additional 400 million sources with only positions, for a total of more than 1.8 billion sources with a mean G magnitude.

Additionally from the 13th of June 2022, the full Gaia DR3 adds radial velocities for more than 33 million sources (about 4 times more than Gaia DR2). Followed by about 200 millions BP/RP spectra and about 1 million high resolution spectra from the radial velocity spectrometer (RVS). Finally Gaia DR3 publish a huge catalog of objects classification of more than 1.59 billion sources, and a large variaty of smaller specifica catalogs like non-single stars, variable sources, galaxy and QSO candidates, solar system objects, and more.

The Gaia (E)DR3 release delivers an overall improvement in sky-coverage (almost complete down to 19 mag) and a great improvement in precision of both astrometric and photometric measurements.

Gaia (E)DR3 data is based on data collected between 25 July 2014 and 28 May 2017, spanning a period of 34 months of data collection. The reference epoch for Gaia DR3 (both Gaia EDR3 and the full Gaia DR3) is J2016.0. Positions and proper motions are referred to the ICRS, to which the optical reference frame defined by Gaia DR3 (Gaia-CRF3) is aligned. The time coordinate for Gaia DR3 results is the barycentric coordinate time (TCB).


If you have used Gaia data in your research, please use the following acknowledgement:

This work has made use of data from the European Space Agency (ESA) mission Gaia (, processed by the Gaia Data Processing and Analysis Consortium (DPAC, Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

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