Gaia data releases

Release When Data available
GDR1 14.09.2016
  • Positions: ra, ra_error, dec, dec_error
  • G mean magnitudes: phot_g_mean_mag
  • Proper motions and parallaxes from Tycho2 for corresponding Gaia sources (tgas_source):
    pmra, pmra_error, pmdec, pmdec_error
GDR2 25.04.2018
  • Five parameter astrometric solution: Positions (ra, dec), parallaxes and proper motion
  • Radial velocities
  • GBP and GRP magnitudes, full passband definitions for G, BP and RP
  • Effective temperatures Teff for more than 161 million sources brighter than 17th magnitude
  • Epoch astrometry for 14,099 known solar system objects
  • Classifications for more than 550,000 variable sources
GEDR3 3.12.2020
  • Improved astrometry (positions, parallaxes, proper motions)
  • Improved photometry (integrated G, GBP, GRP)
GDR3 expected first half 2022
  • Object classification and astrophysical parameters, together with BP/RP spectra and/or RVS spectra they are based on, for spectroscopically and (spectro-)photometrically well-behaved objects.
  • Mean radial velocities for stars with available atmospheric-parameter estimates.
    Variable-star classifications together with the epoch photometry used for the stars.
  • Solar-system results with preliminary orbital solutions and individual epoch observations.
  • Non-single stars.
  • Quasars and Extended Objects results.
  • An additional data set, called the Gaia Andromeda Photometric Survey (GAPS), consisting of the photometric time series for *all* sources located in a 5.5 degree radius field centred on the Andromeda galaxy.
GDR4 tbc
Final release 2025?

For more detailed information please check the ESA Gaia data release scenario.