Gaia EDR3

Contents of Gaia EDR3 The full astrometric solution (5 parameters) - positions on the sky (α, δ), parallaxes, and proper motions - for around 1.468 billion sources, with a limiting magnitude of about G ≈ 21 and a bright limit of about G ≈ 3. The astrometric solution is accompanied with some new quality indicators, like RUWE, and source image descriptors. The full astrometric solution has been done as 5-parameter solution for 585 million sources and as 6-parameter solution for 882 million sources. In the 6-parameter solution, the additional fitted quantity is the so-called pseudo-colour that had to be included for sources without high-quality colour information. In addition, two-parameters solutions - positions on the sky (α, δ) - for around 344 million additional sources. G magnitudes for around 1.806 billion sources. GBP and GRP magnitudes for around 1.542 billion and 1.555 billion sources, respectively. Please be aware that the photometric system for the G, GBP, and GRP bands in Gaia EDR3 is different from the photometric system as used in Gaia DR2 and Gaia DR1. Full passband definitions for G, GBP, and GRP. About 1.614 million celestial reference frame (Gaia-CRF3) sources. Cross-matches between Gaia EDR3 sources on the one hand and Hipparcos-2, Tycho-2 + TDSC merged, 2MASS PSC (merged with 2MASX), SDSS DR13, Pan-STARRS1 DR1, SkyMapper DR1, GSC 2.3, APASS DR9, RAVE DR5, allWISE, and URAT-1 data on the other hand. Additionally, a Gaia DR2 to Gaia EDR3 match table. Simulated data from Gaia Object Generator (GOG) and Gaia Universe Model Snapshot (GUMS). The commanded scan law covering the Gaia EDR3 data collection period. Also the major periods where data was not sent to the ground or could not be processed are identified.