{"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":"2026-09-02T12:08:24.433Z","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-1732501","name":"PGC 1732501","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":15.761,"mag_band":"B","abs_mag":-18.88766997550199,"abs_mag_band":"B","distance_ly":277434119.3285231,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":181.992798,"dec_deg":25.321161,"epoch_ra_deg":182.335234,"epoch_dec_deg":25.171707,"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":"Coma Berenices","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-1732501","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.761,"h_mag":12.257,"j_mag":12.986,"k_mag":12.059,"redshift":0.0219,"hubble_type":"S0","redshift_cmb":0.0195711286550585,"uncertainties":{"distance_ly":[15623581.973009901,15628502.070102684],"stellar_mass_solar":[1868290499.2436504,1868290499.2436504]},"major_axis_arcmin":0.666813,"minor_axis_arcmin":0.284396,"morphology_source":"SIMBAD (quality D)","position_angle_deg":88,"stellar_mass_solar":11209742995.461903},"designations":[{"catalog":"2MASX","designation":"2MASX 12075827+2519161"},{"catalog":"PGC","designation":"PGC 1732501"},{"catalog":"WISExSCOS","designation":"WISExSCOS J120758.25+251916.2"}],"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":"2026-09-01T22:58:55.274Z","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."}