The second release of the Gaia catalog (Gaia DR2) includes data for approximately 1.6 billion stars.  The limiting magnitude is around 21.  This catalog offers astrometric precision of 0.002" at the 20 magnitude level.

The offline variant, "GRAPPA", was developed by Marc Serrau.  Please also include the following acknowledgements if using the catalog in a published paper:

Acknowledgements:
- Marc Serrau
- ESA GAIA Mission as GRAPPA2 has made use of data from the European Space Agency
(ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium).

Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.