{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T02:12:53.547Z","years_from_j2000":26.666,"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":"ngc-482","name":"NGC 482","class":"spiral_galaxy_sab","category":"galaxy","object_type":"Spiral galaxy Sab","mag":14.47,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":301202149.3694271,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":20.085083333333333,"dec_deg":-40.96611111111111,"epoch_ra_deg":20.386172,"epoch_dec_deg":-40.825076,"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":"Phoenix","discovered":"1835","featured":false,"url":"https://spacecatalog.org/object/ngc-482","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.47,"h_mag":10.06,"j_mag":10.88,"k_mag":9.78,"redshift":0.021922,"hubble_type":"Sab","wikidata_id":"Q781653","redshift_cmb":0.021221845292608288,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[18680427.402771283,18680427.402771283]},"major_axis_arcmin":2.06,"minor_axis_arcmin":0.53,"wikipedia_article":"NGC 482","position_angle_deg":84,"surface_brightness":23.98,"radial_velocity_km_s":6500},"designations":[{"catalog":"2MASX","designation":"2MASX J01202040-4057579"},{"catalog":"ESO","designation":"ESO 296-013"},{"catalog":"ESO","designation":"ESO 296-13"},{"catalog":"ESO-LV","designation":"ESO-LV 296-0130"},{"catalog":"IRAS","designation":"IRAS F01181-4113"},{"catalog":"LEDA","designation":"LEDA 4823"},{"catalog":"MCG","designation":"MCG -07-03-017"},{"catalog":"NGC","designation":"NGC 482"},{"catalog":"PGC","designation":"PGC 4823"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"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."}