{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T17:21:08.412Z","years_from_j2000":26.681,"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-131161","name":"PGC 131161","class":"spiral_galaxy_s","category":"galaxy","object_type":"Spiral galaxy S","mag":15.68,"mag_band":"B","abs_mag":-19.63805284135924,"abs_mag_band":"B","distance_ly":377603875.9290804,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":45.188187,"dec_deg":-40.234226,"epoch_ra_deg":45.443965,"epoch_dec_deg":-40.127423,"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":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-131161","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.68,"h_mag":13.894,"j_mag":14.328,"k_mag":13.564,"redshift":0.025725,"hubble_type":"S","redshift_cmb":0.0265016005130257,"uncertainties":{"distance_ly":[76067270.52501126,76603867.49140021],"stellar_mass_solar":[1868209100.292087,1868209100.292087]},"major_axis_arcmin":0.530507,"minor_axis_arcmin":0.394485,"morphology_source":"SIMBAD (1996MNRAS.278.1025L, quality D)","position_angle_deg":13,"stellar_mass_solar":2802313650.438131},"designations":[{"catalog":"2MASX","designation":"2MASX 03004516-4014032"},{"catalog":"PGC","designation":"PGC 131161"},{"catalog":"WISExSCOS","designation":"WISExSCOS J030045.12-401402.8"}],"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":"2026-09-02T19:50:56.720Z","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."}