{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T17:57:54.720Z","years_from_j2000":26.667,"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-39772","name":"PGC 39772","class":"elliptical_galaxy_de_d_e","category":"galaxy","object_type":"Elliptical galaxy dE(d:E)","mag":15.112,"mag_band":"B","abs_mag":-17.767366680249985,"abs_mag_band":"B","distance_ly":122828517.83138749,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":185.050888,"dec_deg":6.623107,"epoch_ra_deg":185.39358,"epoch_dec_deg":6.474053,"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":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-39772","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.112,"h_mag":12.948,"j_mag":13.591,"k_mag":12.749,"redshift":0.00818,"hubble_type":"dE(d:E)","redshift_cmb":0.0087352035653957,"uncertainties":{"distance_ly":[9823782.927215174,9824189.202096572],"stellar_mass_solar":[186841785.39288408,186841785.39288408]},"major_axis_arcmin":0.848153,"minor_axis_arcmin":0.574624,"morphology_source":"SIMBAD (2014A&A...569A.124V, quality C)","position_angle_deg":133,"stellar_mass_solar":467104463.48221016},"designations":[{"catalog":"2MASX","designation":"2MASX 12201221+0637231"},{"catalog":"PGC","designation":"PGC 39772"},{"catalog":"WISExSCOS","designation":"WISExSCOS J122012.21+063724.7"}],"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."}