UGC ivo://nasa.heasarc/ugc NASA/GSFC HEASARC Nilson 2026-04-24 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Galaxy The Uppsala General Catalogue of Galaxies (UGC) is an essentially complete catalog of galaxies to a limiting diameter of 1.0 arcminute and/or to a limiting apparent magnitude of 14.5 on the blue prints of the Palomar Observatory Sky Survey (POSS). Coverage is limited to the sky north of declination -02.5 degrees. Galaxies smaller than 1.0 arcminute in diameter but brighter than 14.5 mag may be included from the Catalogue of Galaxies and of Clusters of Galaxies (CGCG, Zwicky et al. 1961-1968); all such galaxies in the CGCG are included in the UGC. The galaxies are numbered in order of their 1950.0 right ascension values. The catalog contains descriptions of the galaxies and their surrounding areas, plus conventional system classifications and position angles for flattened galaxies. Galaxy diameters on both the blue and red POSS prints are included and the classifications and descriptions are given in such a way as to provide as accurate an account as possible of the appearance of the galaxies on the prints. Only the data portion of the published UGC is included in the machine-readable version, notice. For additional details regarding the classifications, measurement of apparent magnitudes, and data content, the source reference should be consulted. This database table was first ingested by the HEASARC in September 2000 based on a machine-readable version of the UGC obtained from the ADC (ADC Catalog VII/26D). This latter version was a corrected and modified version of the original magnetic tape version of the UGC. A list of the types of changes and modifications made by the ADC is available at <a href="https://cdsarc.u-strasbg.fr/ftp/cats/VII/26D/ReadMe">https://cdsarc.u-strasbg.fr/ftp/cats/VII/26D/ReadMe</a>, while the list of the affected entries is available at <a href="https://cdsarc.u-strasbg.fr/ftp/cats/VII/26D/errors.dat.gz">https://cdsarc.u-strasbg.fr/ftp/cats/VII/26D/errors.dat.gz</a>. <p> The HEASARC last updated this database table in November 2021 upon reflection that the original catalog's coordinates were B1950 (instead of J1950, as originally assumed by the HEASARC). Due to the precision of the coordinates in this catalog, the difference is negligible. This is a service provided by NASA HEASARC . 1973UGC...C...0000N https://heasarc.gsfc.nasa.gov/W3Browse/all/ugc.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=ugc& GET text/xml 180 99999 true 160.98385501 -4.32937166 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=ugc GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_ugc&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GALAXY CATALOG 0.0833333333333333 Optical public ugc Uppsala General Catalog of Galaxies name UGC Catalog Source Designation meta.id char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable hubble_type Hubble Object Type src.morph.type char nullable phot_mag Photographic Magnitude mag phot.mag float nullable radial_velocity Radial Velocity (km/s) km/s spect.dopplerVeloc short nullable position_angle Position Angle (degree) degree pos.posAng short nullable red_major_axis Red Print Major Axis (arcmin) arcmin phys.size.smajAxis float nullable blue_major_axis Blue Print Major Axis (arcmin) arcmin phys.size.smajAxis float nullable blue_minor_axis Blue Print Minor Axis (arcmin) arcmin phys.size.sminAxis float nullable poss_field POSS Field Number meta.id;obs.field short nullable inclination_code Inclination Code for Spirals meta.code short nullable lii Galactic Longitude degree pos.galactic.lon double nullable class Browse Object Classification src.class short nullable mcg MCG Designation meta.id char nullable bii Galactic Latitude degree pos.galactic.lat double nullable red_minor_axis Red Print Minor Axis (arcmin) arcmin phys.size.sminAxis float nullable ugc_number UGC Catalog Number meta.id;meta.main short 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