Note: USNO-A2.0 contains 526,280,881 sources, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans from POSS-I O and E plates (>=-18°) and SRC-J and ESO-R plates (<=-20°). USNO-A2.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory.
The major difference between USNO-A2.0 and its previous version USNO-A1.0 is that A1.0 used the Guide Star Catalog as its reference frame whereas A2.0 uses the ICRF as realized by the USNO ACT catalog (Urban et al. 1997). The VizieR search engine uses an on-line compressed version (3.6Gbytes) which was generated at CDS.

I/252/out

The USNO-A2.0 Catalogue (Monet+ 1998) ReadMe+ftp metaI/252/out The Full Catalogue (526280881 rows) (Note)

Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

I/271/out

The GSC 2.2 Catalogue (STScI, 2001) ReadMe+ftp metaI/271/out The Full GSC2.2.1 Catalogue (455851237 objects) (455851237 rows)

Note: The USNO-B Catalog presents positions, proper motions, magnitudes un blue, red and infrared, as well as star/galaxy estimators for 1,045,175,762 objects derived from 3,648,832,040 separate observations. The data were taken from scans of 7,435 Schmidt plates taken from various sky surveys during the last 50 years.
USNO-B1.0 catalog was created by Dave Monet and collaborators at http://www.nofs.navy.mil/data/fchpix/
Note that the star/galaxy estimators may be mixed up in dense regions.

I/284/out

The USNO-B1.0 Catalog (Monet+ 2003) ReadMe+ftp 2003AJ....125..984M metaI/284/out The Whole-Sky USNO-B1.0 Catalog of 1,045,913,669 sources (1045175762 rows)

Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry.
An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms

I/297/out

NOMAD Catalog (Zacharias+ 2005) ReadMe+ftp 2004AAS...205.4815Z metaI/297/out The NOMAD-1 Catalog (1117612732 rows)

Note: This version of the GSC-II has no proper motions, but the limits on brightness which existed on GSC2.2 (F<18.5, B_j<19.5) were removed.

I/305/out

The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006) ReadMe+ftp 2008AJ....136..735L metaI/305/out The Full GSC2.3.2 Catalogue (945592683 objects) (945592683 rows)

I/317/sample

The PPMXL Catalog (Roeser+ 2010) ReadMe+ftp 2010AJ....139.2440R metaI/317/sample PPMXL catalog of positions and proper motions on the ICRS (910469430 rows)

Note:

I/324/igsl3

The Initial Gaia Source List (IGSL) (Smart, 2013) ReadMe+ftp 2013yCat.1324....0S metaI/324/igsl3 IGSL3 data release (1,222,598,530 sources) (1222598530 rows)

I/345/gaia2

Gaia DR2 (Gaia Collaboration, 2018) ReadMe+ftp 2018A&A...616A...1G metaI/345/gaia2 Gaia data release 2 (Gaia DR2). (Download all Gaia Sources as VOTable, FITS or CSV here. Query from the command line using find_gaia_dr2 available in cdsclient here) (original column names in green) (1692919135 rows)

I/347/gaia2dis

Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) ReadMe+ftp 2018AJ....156...58B metaI/347/gaia2dis Estimating distances from parallaxes (1331909727 sources) (original column names in green) (1331909727 rows)

I/350/gaiaedr3

Gaia EDR3 (Gaia Collaboration, 2020) ReadMe+ftp 2020yCat.1350....0G metaI/350/gaiaedr3 Gaia data early release 3 (Gaia EDR3). (Download all Gaia Sources as VOTable, FITS or CSV here. Query from the command line using find_gaia_edr3 available in cdsclient here) (original column names in green) (1811709771 rows)

I/352/gedr3dis

Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021) ReadMe+ftp 2021AJ....161..147B metaI/352/gedr3dis Estimating distances from parallaxes (1467744818 sources) (original column names in green) (1467744818 rows)

I/353/gsc242

The Guide Star Catalog, Version 2.4.2 (GSC2.4.2) (STScI, 2020) ReadMe+ftp 2008AJ....136..735L metaI/353/gsc242 Guide Star Catalogue, Version 2.4.2 (original column names in green) (3485671481 rows)

I/355/gaiadr3

Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) ReadMe+ftp 2022yCat.1355....0G metaI/355/gaiadr3 Gaia data release 3 (Gaia DR3). (original column names in green) timeSerie spectrum (1811709771 rows)

I/355/paramp

Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) ReadMe+ftp 2022yCat.1355....0G metaI/355/paramp 1D astrophysical parameters produced by the Apsis processing chain developed in Gaia DPAC CU8 (1590932717 sources) (astrophysical_parameters) (original column names in green) (1590932717 rows)

I/355/paramsup

Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022) ReadMe+ftp 2022yCat.1355....0G metaI/355/paramsup Additional parameters from the Apsis processing chain, compared to the main table astrophysical parameters, from modules that produce more than one result for a parameter (473020612 sources) (astrophysicalparameterssupp) (original column names in green) (473020612 rows)

Note:

II/312/ais

GALEX-DR5 (GR5) sources from AIS and MIS (Bianchi+ 2011) ReadMe+ftp 2011Ap&SS.335..161B metaII/312/ais Sample of the AIS (All-sky Imaging Survey) (out of 65,266,291 sources) (65266291 rows)

Note:

II/335/galex_ais

Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017) ReadMe+ftp 2017ApJS..230...24B metaII/335/galex_ais Sample of the revised GALEX catalog of UV sources (GUVcat_AIS) from GR6+7 (82,992,086 sources) (original column names in green) (82992086 rows)

II/358/smss

SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018) ReadMe+ftp 2018PASA...35...10W metaII/358/smss SkyMapper DR1.1 (original column names in green) (285159194 rows)

Note:

IV/38/tic

TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019) ReadMe+ftp 2019AJ....158..138S metaIV/38/tic Transiting Exoplanet Survey Satellite (TESS) Input Catalog - v8.0 (TIC-8) (original column names in green) (1727987580 rows)

Note:

IV/39/tic82

TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021) ReadMe+ftp 2021arXiv210804778P metaIV/39/tic82 Transiting Exoplanet Survey Satellite (TESS) Input Catalog - v8.2 (TIC-8.2) (original column names in green) (1727987580 rows)

VI/42/out

Identification of a Constellation From Position (Roman 1987) ReadMe+ftp 1987PASP...99..695R metaVI/42/out Compute constellation name from Position (357 rows)

J/ApJ/658/345/table4

CRIc photometry of Magellanic Bridge Fields (Harris, 2007) ReadMe+ftp 2007ApJ...658..345H metaJ/ApJ/658/345/table4 Photometry of stars in Magellanic Bridge Fields (272304 rows)

J/ApJ/867/105/refcat2

ATLAS all-sky stellar ref. catalog, ATLAS-REFCAT2 (Tonry+, 2018) ReadMe+ftp 2018ApJ...867..105T metaJ/ApJ/867/105/refcat2 ATLAS all-sky stellar reference catalog, ATLAS-REFCAT2 (original column names in green) (992637834 rows)

J/A+A/616/A12/tabled3

Gaia DR2 sources in GC and dSph (Gaia Collaboration+, 2018) ReadMe+ftp 2018A&A...616A..12G metaJ/A+A/616/A12/tabled3 Possible members data for all groups (10010064 rows)

J/MNRAS/482/4570/gaia2wd

Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019) ReadMe+ftp 2019MNRAS.482.4570G metaJ/MNRAS/482/4570/gaia2wd DR2 white dwarf candidates, corrected version (gaiadr2whitedwarfcandidates.dat) (486641 rows)