{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T11:18:34.574Z","years_from_j2000":26.686,"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-4078316","name":"PGC 4078316","class":"galaxy","category":"galaxy","object_type":"Galaxy","mag":15.591,"mag_band":"B","abs_mag":-19.31804325035049,"abs_mag_band":"B","distance_ly":312776795.0922586,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":288.210846,"dec_deg":-19.502409,"epoch_ra_deg":288.605606,"epoch_dec_deg":-19.457364,"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-4078316","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.591,"h_mag":11.942,"j_mag":12.618,"k_mag":11.545,"redshift":0.02165,"redshift_cmb":0.0220242932092464,"uncertainties":{"distance_ly":[16178319.00060533,16182913.17537131],"stellar_mass_solar":[2802392522.289638,2802392522.289638]},"stellar_mass_solar":18682616815.264256},"designations":[{"catalog":"2MASX","designation":"2MASX 19125060-1930086"},{"catalog":"Other","designation":"6dFJ1912506-193009"},{"catalog":"PGC","designation":"PGC 4078316"},{"catalog":"WISExSCOS","designation":"WISExSCOS J191250.61-193008.9"}],"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."}