{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T23:06:01.171Z","years_from_j2000":26.668,"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-770402","name":"PGC 770402","class":"spiral_galaxy_sp","category":"galaxy","object_type":"Spiral galaxy Sp","mag":15.73,"mag_band":"B","abs_mag":-17.469421186729274,"abs_mag_band":"B","distance_ly":142334477.86896098,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":158.122711,"dec_deg":-26.198124,"epoch_ra_deg":158.438349,"epoch_dec_deg":-26.336124,"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":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-770402","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.73,"h_mag":13.026,"j_mag":13.718,"k_mag":12.797,"redshift":0.00992,"hubble_type":"Sp","redshift_cmb":0.0101119246229027,"uncertainties":{"distance_ly":[7927750.0956064,7928648.4143116595],"stellar_mass_solar":[373680332.3968169,373680332.3968169]},"major_axis_arcmin":0.95542,"minor_axis_arcmin":0.252518,"morphology_source":"SIMBAD (quality D)","position_angle_deg":119,"stellar_mass_solar":840780747.8928381},"designations":[{"catalog":"2MASX","designation":"2MASX 10322945-2611532"},{"catalog":"PGC","designation":"PGC 770402"},{"catalog":"WISExSCOS","designation":"WISExSCOS J103229.46-261153.3"}],"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."}