{"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":"2026-09-03T21:23:03.310Z","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-12004","name":"PGC 12004","class":"spiral_galaxy_s_s0ba","category":"galaxy","object_type":"Spiral galaxy S/S0Ba","mag":14.522,"mag_band":"B","abs_mag":-20.240453744392696,"abs_mag_band":"B","distance_ly":292359105.2563752,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":48.369839,"dec_deg":41.075165,"epoch_ra_deg":48.810482,"epoch_dec_deg":41.175769,"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":"Perseus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-12004","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.522,"h_mag":11.118,"j_mag":11.829,"k_mag":10.856,"redshift":0.01835,"hubble_type":"S/S0Ba","redshift_cmb":0.0206081465822742,"uncertainties":{"distance_ly":[33182826.55308517,33184189.94535789],"stellar_mass_solar":[4670695765.474827,4670695765.474827]},"major_axis_arcmin":0.65,"minor_axis_arcmin":0.299,"morphology_source":"SIMBAD (2020A&A...640A..30M, quality C)","position_angle_deg":0,"stellar_mass_solar":37365566123.798615},"designations":[{"catalog":"2MASX","designation":"2MASX 03132876+4104305"},{"catalog":"PGC","designation":"PGC 12004"},{"catalog":"WISExSCOS","designation":"WISExSCOS J031328.72+410430.4"}],"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."}