{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T20:35:37.842Z","years_from_j2000":26.67,"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-34518","name":"PGC 34518","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":15.442,"mag_band":"B","abs_mag":-19.470410994835284,"abs_mag_band":"B","distance_ly":313262258.1211433,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":169.469421,"dec_deg":29.304523,"epoch_ra_deg":169.829741,"epoch_dec_deg":29.15789,"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-34518","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.442,"h_mag":12.302,"j_mag":13.088,"k_mag":11.934,"redshift":0.02343,"hubble_type":"S0","redshift_cmb":0.0220579291337269,"uncertainties":{"distance_ly":[16675061.0473608,16680710.537885964],"stellar_mass_solar":[7473045075.413653,7473045075.413653]},"major_axis_arcmin":0.53311,"minor_axis_arcmin":0.449305,"morphology_source":"SIMBAD (quality D)","position_angle_deg":3,"stellar_mass_solar":14946090150.827307},"designations":[{"catalog":"2MASX","designation":"2MASX 11175266+2918162"},{"catalog":"PGC","designation":"PGC 34518"},{"catalog":"WISExSCOS","designation":"WISExSCOS J111752.66+291816.2"}],"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."}