CNS3 ivo://nasa.heasarc/cns3 NASA/GSFC HEASARC Gliese, Jahreiss 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star The CNS3 catalog contains all known stars as of 1991 that are within 25 parsecs of the Sun. It depends mainly on a preliminary version (Spring 1989) of the new General Catalogue of Trigonometric Parallaxes (YPC) prepared by Dr. William F. van Altena (Yale University). The catalog contains every then-known star with a trigonometric parallax greater than or equal to 0.0390 arcsec, even though it may be evident from photometry or for other reasons that the star has a larger distance. For red dwarf stars, new color-magnitude calibrations for broad-band colors were carried out and applied. For white dwarfs, the recipes of McCook and Sion in ApJS, 65, 603 (1987) were applied. Stroemgren photometry was used (not yet systematically) for early-type stars and for late dwarfs, the latter supplied by E. H. Olsen from Copenhagen Observatory (private communication). In contrast to the CNS2 (Gliese 1969) catalog, trigonometric parallaxes and photometric or spectroscopic parallaxes were not combined in this version. The resulting parallax in the present version is the trigonometric parallax if the relative error of the trigonometric parallax is smaller than 14 percent. The parallax may be the photometric or spectroscopic parallax only if no trigonometric parallax is available or if the standard error of the trigonometric parallax is considerably larger. The original catalog and the notes describing it were prepared by Wilhelm Gliese and Hartmut Jahreiss, Astronomisches Rechen-Institut, Moenchhofstrasse 12-14, D-6900 Heidelberg 1, Germany, in 1991. The CDS has made a number of formatting and documentation changes in the period 1994-1997, e.g., in December 1997 it added a running number to the name for 1388 stars which had all been given the same name of "NN" in the original version, starting with "NN 3001" (for the first "NN" star in order of 1950 RA), and ending with "NN 4388" (for the last "NN" star in order of 1950 RA). This revised version of the catalog (CDS/ADC Catalog V/70A) was used by the HEASARC to create this database in February 2001. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/cns3.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cns3& GET text/xml 180 99999 true 253.5394158 -87.41036097 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cns3 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cns3&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0833333333333333 Optical public cns3 Gliese Catalog of Nearby Stars, 3rd Edition name Catalog Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable app_mag Apparent Magnitude phot.mag;em.opt float nullable spect_type Spectral Type or Color Class src.spType char nullable result_parallax Resulting Parallax (mas) mas pos.parallax.trig float nullable result_parallax_error Standard Error of Resulting Parallax mas stat.error;pos.parallax.trig float nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable flag_proper_motion Proper Motion Uncertainty Flag [:] meta.code;pos.pm char nullable radial_velocity_code Radial Velocity Remark Code meta.code;spect.dopplerVeloc;pos.heliocentric char nullable dir_proper_motion Direction Angle of Proper Motion degree pos.posAng;pos.pm float nullable uvel U Space Velocity Component towards Galactic Center km/s phys.veloc;pos.galactic short nullable vvel V Space Velocity Component towards Galactic Rotation km/s phys.veloc;pos.galactic short nullable hd_number HD Catalog Number meta.id int nullable ri_color R-I Color phot.color;em.opt.R;em.opt.I float nullable ub_color_joint Joint U-B Color Flag meta.code;phot.color;em.opt.U;em.opt.B char nullable ub_color U-B Color phot.color;em.opt.U;em.opt.B float nullable ri_color_joint Joint R-I Color Flag phot.color;em.opt.R;em.opt.I char nullable abs_vmag_code Quality Code for Absolute Magnitude meta.code;phys.magAbs;em.opt.V char nullable bv_color B-V Color phot.color;em.opt.B;em.opt.V float nullable dm_number Durchmusterung Zone and Number meta.id char nullable component Components (A, B, C ...) meta.id char nullable trig_parallax Trigonometric Parallax (mas) mas pos.parallax.trig float nullable result_parallax_code Parallax Code [RWSOP] meta.code;pos.parallax.trig char nullable wvel W Space Velocity Component towards North Galactic Pole km/s phys.veloc;pos.galactic short nullable class Browse Classification src.class short nullable giclas_number Giclas Catalog Number meta.id char nullable radial_velocity Radial Velocity (km/s) km/s spect.dopplerVeloc;pos.heliocentric float nullable bii Galactic Latitude degree pos.galactic.lat double nullable remarks Additional Identifications and Remarks meta.note char nullable trig_parallax_error Standard Error of Trigonometric Parallax (mas) mas stat.error;pos.parallax.trig float nullable ri_color_code Reference Code for R-I Color meta.code;phot.color;em.opt.R;em.opt.I char nullable distance_code Reliability of the Distance meta.code.qual;pos.distance char nullable ref_spect_type Reference Code for Spectral Type meta.ref;src.spType char nullable app_mag_code Reference Code for Apparent Magnitude meta.code;phot.mag;em.opt char nullable lii Galactic Longitude degree pos.galactic.lon double nullable lhs_number LHS Catalog Number meta.id char nullable tot_proper_motion Total Proper Motion (arcsec/yr) arcsec/yr pos.pm float nullable abs_vmag Absolute Visual Magnitude phys.magAbs;em.opt.V float nullable ub_color_code Reference Code for U-B Color meta.code;phot.color;em.opt.U;em.opt.B char nullable bv_color_code Reference Code for B-V Color meta.code;phot.color;em.opt.B;em.opt.V char nullable app_mag_joint Joint Apparent Magnitude Flag meta.code;phot.mag;em.opt.V char nullable bv_color_joint Joint B-V Color Flag meta.code;phot.color;em.opt.B;em.opt.V char nullable other_name Alternative Catalog Designations meta.id char nullable