Gaia EDR3

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.

The EDR3 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. It spans 34 month of data collection by the Gaia satellite.</p> <p>The reference epoch for Gaia DR3 (both Gaia EDR3 and the full Gaia DR3) is 2016.0. Positions and proper motions are referred to the ICRS.