{"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":"2026-09-02T05:26:14.261Z","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-64389","name":"PGC 64389","class":"lenticular_galaxy","category":"galaxy","object_type":"Lenticular galaxy","mag":12.87,"mag_band":"B","abs_mag":-21.50728294110465,"abs_mag_band":"B","distance_ly":244840052.20619568,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":304.075012,"dec_deg":-44.299946,"epoch_ra_deg":304.540593,"epoch_dec_deg":-44.217606,"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":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-64389","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.87,"h_mag":9.941,"j_mag":10.63,"k_mag":9.668,"redshift":0.0170293285147,"hubble_type":"-1.9","redshift_cmb":0.0173009819273491,"uncertainties":{"distance_ly":[15420661.087939491,15423003.288303005],"stellar_mass_solar":[7473268728.528158,7473268728.528158]},"major_axis_arcmin":0.79,"minor_axis_arcmin":0.632,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":10,"stellar_mass_solar":60720308419.29128},"designations":[{"catalog":"2MASX","designation":"2MASX 20161800-4417598"},{"catalog":"PGC","designation":"PGC 64389"},{"catalog":"WISExSCOS","designation":"WISExSCOS J201618.02-441759.6"}],"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."}