{"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":"2026-09-01T16:46:59.020Z","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-12992","name":"PGC 12992","class":"spiral_galaxy_s","category":"galaxy","object_type":"Spiral galaxy S","mag":15.65,"mag_band":"B","abs_mag":-19.452711385019235,"abs_mag_band":"B","distance_ly":341954365.3146554,"distance_method":"luminosity distance from a photometric redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":52.4628,"dec_deg":40.02985,"epoch_ra_deg":52.905621,"epoch_dec_deg":40.122296,"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":"Perseus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-12992","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.65,"h_mag":12.649,"j_mag":13.44,"k_mag":12.404,"redshift":0.022027961014,"hubble_type":"S","redshift_cmb":0.0240430114596884,"uncertainties":{"distance_ly":[65473726.99227712,65865064.647694625],"stellar_mass_solar":[4670594936.089679,4670594936.089679]},"major_axis_arcmin":0.823,"minor_axis_arcmin":0.148,"morphology_source":"SIMBAD (quality D)","position_angle_deg":95,"stellar_mass_solar":7472951897.743486},"designations":[{"catalog":"2MASX","designation":"2MASX 03295119+4001468"},{"catalog":"PGC","designation":"PGC 12992"}],"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."}