{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T16:46:23.431Z","years_from_j2000":26.667,"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-24778","name":"PGC 24778","class":"spiral_galaxy","category":"galaxy","object_type":"Spiral galaxy","mag":13.659,"mag_band":"B","abs_mag":-19.72295597849461,"abs_mag_band":"B","distance_ly":154816437.95478174,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":132.251602,"dec_deg":-7.82984,"epoch_ra_deg":132.580103,"epoch_dec_deg":-7.928946,"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-24778","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.659,"h_mag":11.192,"j_mag":11.851,"k_mag":10.918,"redshift":0.00977,"hubble_type":"4","redshift_cmb":0.0109914179792521,"uncertainties":{"distance_ly":[8038877.084532744,8039723.678716791],"stellar_mass_solar":[934195678.3558224,934195678.3558224]},"major_axis_arcmin":1.6631,"minor_axis_arcmin":0.921191,"morphology_source":"SIMBAD (2005ApJS..160..149S, quality D)","position_angle_deg":159,"stellar_mass_solar":2802587035.067467},"designations":[{"catalog":"2MASX","designation":"2MASX 08490038-0749474"},{"catalog":"PGC","designation":"PGC 24778"},{"catalog":"WISExSCOS","designation":"WISExSCOS J084900.38-074948.2"}],"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."}