{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T07:10:39.743Z","years_from_j2000":26.666,"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-56110","name":"PGC 56110","class":"lenticular_galaxy_sa0_a","category":"galaxy","object_type":"Lenticular galaxy SA0/a","mag":15.24,"mag_band":"B","abs_mag":-17.627449490270735,"abs_mag_band":"B","distance_ly":122156272.82570325,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":237.257156,"dec_deg":27.609966,"epoch_ra_deg":237.536052,"epoch_dec_deg":27.527482,"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":"Corona Borealis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-56110","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.24,"h_mag":13.254,"j_mag":13.832,"k_mag":13.126,"redshift":0.00739,"hubble_type":"SA0/a","redshift_cmb":0.0086877064409086,"uncertainties":{"distance_ly":[6343367.407112787,6343831.321276204],"stellar_mass_solar":[280262758.873978,280262758.873978]},"major_axis_arcmin":0.755343,"minor_axis_arcmin":0.374273,"morphology_source":"SIMBAD (2015ApJS..217...27A, quality C)","position_angle_deg":17,"stellar_mass_solar":653946437.3726155},"designations":[{"catalog":"2MASX","designation":"2MASX 15490171+2736358"},{"catalog":"PGC","designation":"PGC 56110"},{"catalog":"WISExSCOS","designation":"WISExSCOS J154901.68+273635.7"}],"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":"2026-08-30T09:56:50.739Z","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."}