Gaia Data Release 2 on April 25th

ESA has announced the release of the second Gaia catalogue (Gaia-DR2) on April 25th 2018.

The table below summarizes the contents of the new catalogue. For comparison, the numbers of the previous catalogue (DR1) are also shown. The numbers provided can change slightly dependent on results obtained during validation, an activity that is taking place this very moment.

#sources in Gaia DR2 #sources in Gaia DR1
Total number of sources 1,500,000,000 1,142,679,769
Number of 5-parameter sources 1,300,000,000 2,057,050
Number of 2-parameter sources 200,000,000 1,140,622,719
Sources with mean G magnitude 1,500,000,000 1,142,679,769
Sources with three-band photometry (G, GBP, GRP) 1,100,000,000
Sources with radial velocities (GRVS) 5,000,000
Lightcurves for variable sources 500,000 3,194
Known asteroids with epoch data 13,000
Additional astrophysical parameters: 150,000,000


Gaia DR2 data is based on data collected in a period of 22 months (or 668 days), as compared to Gaia DR1 which was based on observations collected in the first 14 months of Gaia’s routine operational phase.

More information at ESA website.