{"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":"2026-09-03T21:23:24.940Z","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-103193","name":"PGC 103193","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":16.121,"mag_band":"B","abs_mag":-18.54675234964517,"abs_mag_band":"B","distance_ly":279882887.07397276,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":64.781761,"dec_deg":-45.585167,"epoch_ra_deg":64.988821,"epoch_dec_deg":-45.519639,"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":"Horologium","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-103193","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.121,"h_mag":13.885,"j_mag":14.705,"k_mag":13.83,"redshift":0.019032,"redshift_cmb":0.0197413808832849,"uncertainties":{"distance_ly":[55837084.75549559,56132743.671713345],"stellar_mass_solar":[747315399.7159545,747315399.7159545]},"stellar_mass_solar":1307801949.5029209},"designations":[{"catalog":"2MASX","designation":"2MASX 04190762-4535066"},{"catalog":"PGC","designation":"PGC 103193"},{"catalog":"WISExSCOS","designation":"WISExSCOS J041907.58-453506.7"}],"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."}