{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T21:06:04.125Z","years_from_j2000":26.673,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"pgc-572428","name":"PGC 572428","class":"elliptical_galaxy_e","category":"galaxy","object_type":"Elliptical galaxy E","mag":17.66,"mag_band":"B","abs_mag":-15.116532256465998,"abs_mag_band":"B","distance_ly":117147311.60763085,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":193.086,"dec_deg":-41.75134,"epoch_ra_deg":193.458784,"epoch_dec_deg":-41.897371,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Centaurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-572428","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":17.66,"redshift":0.00982086491043,"hubble_type":"E","redshift_cmb":0.0083336947773441,"uncertainties":{"distance_ly":[32115793.547941342,32186251.541055907],"stellar_mass_solar":[56052676.787621655,56052676.787621655]},"major_axis_arcmin":0.25,"minor_axis_arcmin":0.22,"morphology_source":"SIMBAD (2003A&A...412...45P, quality E)","stellar_mass_solar":84079015.18143249},"designations":[{"catalog":"PGC","designation":"PGC 572428"},{"catalog":"WISExSCOS","designation":"WISExSCOS J125220.85-414504.4"}],"source":{"id":"glade_plus","name":"GLADE+ (Galaxy List for the Advanced Detector Era)","url":"https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/291","license":"VizieR terms; cite Dalya+ 2022 (2022MNRAS.514.1403D)"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}