{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T05:51:17.217Z","years_from_j2000":26.674,"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-141730","name":"PGC 141730","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":16,"mag_band":"B","abs_mag":-17.00846597475754,"abs_mag_band":"B","distance_ly":130352411.55980566,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":193.098175,"dec_deg":-26.754187,"epoch_ra_deg":193.458499,"epoch_dec_deg":-26.900222,"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":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-141730","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16,"h_mag":12.947,"j_mag":13.55,"k_mag":12.581,"redshift":0.00999012499506,"redshift_cmb":0.0092665709006304,"uncertainties":{"distance_ly":[29224177.00094189,29305683.380518254],"stellar_mass_solar":[560523490.1552802,560523490.1552802]},"stellar_mass_solar":934205816.925467},"designations":[{"catalog":"2MASX","designation":"2MASX 12522356-2645150"},{"catalog":"PGC","designation":"PGC 141730"},{"catalog":"WISExSCOS","designation":"WISExSCOS J125223.56-264515"}],"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."}