{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T10:36:02.761Z","years_from_j2000":26.669,"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-596","name":"NGC 596","class":"elliptical_galaxy_e","category":"galaxy","object_type":"Elliptical galaxy E","mag":10.95,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":73360716.58235724,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":23.217,"dec_deg":-7.031833333333333,"epoch_ra_deg":23.554022,"epoch_dec_deg":-6.893724,"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":"Cetus","discovered":"1783","featured":false,"url":"https://spacecatalog.org/object/ngc-596","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.85,"h_mag":8.19,"j_mag":8.87,"k_mag":7.98,"v_mag":10.95,"redshift":0.006211,"hubble_type":"E","wikidata_id":"Q1037580","redshift_cmb":0.005231030351007471,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14341663.479096808,14341663.479096808]},"major_axis_arcmin":2.14,"minor_axis_arcmin":1.58,"wikipedia_article":"NGC 596","position_angle_deg":36,"surface_brightness":22.36,"radial_velocity_km_s":1856},"designations":[{"catalog":"2MASX","designation":"2MASX J01325190-0701535"},{"catalog":"LEDA","designation":"LEDA 5766"},{"catalog":"MCG","designation":"MCG -01-05-005"},{"catalog":"NGC","designation":"NGC 596"},{"catalog":"PGC","designation":"PGC 5766"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"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."}