{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:02:39.511Z","years_from_j2000":26.678,"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-740305","name":"PGC 740305","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":16.026,"mag_band":"B","abs_mag":-18.894209957354793,"abs_mag_band":"B","distance_ly":314389379.5882406,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":213.147385,"dec_deg":-28.554367,"epoch_ra_deg":213.53534,"epoch_dec_deg":-28.680548,"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":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-740305","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.026,"h_mag":12.599,"j_mag":13.262,"k_mag":12.323,"redshift":0.0222,"hubble_type":"S0","redshift_cmb":0.0221360168911571,"uncertainties":{"distance_ly":[18604925.23419522,18609232.728519723],"stellar_mass_solar":[1868260351.1137729,1868260351.1137729]},"major_axis_arcmin":0.307,"minor_axis_arcmin":0.141,"morphology_source":"SIMBAD (quality D)","position_angle_deg":5,"stellar_mass_solar":12143692282.239525},"designations":[{"catalog":"2MASX","designation":"2MASX 14123537-2833157"},{"catalog":"PGC","designation":"PGC 740305"},{"catalog":"WISExSCOS","designation":"WISExSCOS J141235.39-283316.7"}],"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."}