{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T09:32:51.619Z","years_from_j2000":26.666,"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-25324","name":"PGC 25324","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":14.909,"mag_band":"B","abs_mag":-18.483825712626896,"abs_mag_band":"B","distance_ly":155593345.0786115,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":135.243561,"dec_deg":47.795341,"epoch_ra_deg":135.704715,"epoch_dec_deg":47.69041,"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":"Ursa Major","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-25324","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.909,"h_mag":11.622,"j_mag":12.341,"k_mag":11.308,"redshift":0.01069,"hubble_type":"Sb","redshift_cmb":0.0110461218062643,"uncertainties":{"distance_ly":[8230757.255069552,8231840.391684073],"stellar_mass_solar":[1868390708.221384,1868390708.221384]},"major_axis_arcmin":1.05821,"minor_axis_arcmin":0.301801,"morphology_source":"SIMBAD (2006A&A...445..765K, quality D)","position_angle_deg":6,"stellar_mass_solar":3736781416.442768},"designations":[{"catalog":"2MASX","designation":"2MASX 09005845+4747432"},{"catalog":"PGC","designation":"PGC 25324"},{"catalog":"WISExSCOS","designation":"WISExSCOS J090058.46+474743.7"}],"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":"2026-08-30T09:56:50.739Z","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."}