{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T07:47:44.249Z","years_from_j2000":26.669,"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-963477","name":"PGC 963477","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":14.956,"mag_band":"B","abs_mag":-18.8249843052031,"abs_mag_band":"B","distance_ly":186047027.7663497,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":195.648254,"dec_deg":-11.635451,"epoch_ra_deg":196.000246,"epoch_dec_deg":-11.779886,"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":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-963477","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.956,"h_mag":13.765,"j_mag":14.365,"k_mag":13.464,"redshift":0.013726,"redshift_cmb":0.0131869521805263,"uncertainties":{"distance_ly":[40085940.732112564,40240200.340201296],"stellar_mass_solar":[560509645.00745,560509645.00745]},"stellar_mass_solar":934182741.6790832},"designations":[{"catalog":"2MASX","designation":"2MASX 13023558-1138076"},{"catalog":"PGC","designation":"PGC 963477"},{"catalog":"WISExSCOS","designation":"WISExSCOS J130235.59-113805.8"}],"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":"2026-09-01T22:58:55.274Z","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."}