{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:03:42.837Z","years_from_j2000":26.665,"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-9523","name":"PGC 9523","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":14.604,"mag_band":"B","abs_mag":-19.657872324699113,"abs_mag_band":"B","distance_ly":232166920.11738116,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":37.523094,"dec_deg":-8.998208,"epoch_ra_deg":37.852984,"epoch_dec_deg":-8.878516,"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":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-9523","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.604,"h_mag":11.13,"j_mag":11.938,"k_mag":10.52,"redshift":0.01611,"hubble_type":"SABc","redshift_cmb":0.0164162774035157,"uncertainties":{"distance_ly":[10566341.287121316,10566437.048467293],"stellar_mass_solar":[28024913655.256454,28024913655.256454]},"major_axis_arcmin":0.737383,"minor_axis_arcmin":0.714672,"morphology_source":"SIMBAD (2025ApJ...978..115W, quality D)","position_angle_deg":7,"stellar_mass_solar":46708189425.42742},"designations":[{"catalog":"2MASX","designation":"2MASX 02300554-0859535"},{"catalog":"PGC","designation":"PGC 9523"},{"catalog":"WISExSCOS","designation":"WISExSCOS J023005.52-085953.2"}],"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":"2026-08-30T09:56:50.739Z","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."}