{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.676","julian_year":2026.676,"time":"2026-09-04T22:01:24.609Z","years_from_j2000":26.676,"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-5938","name":"NGC 5938","class":"barred_spiral_galaxy_sbbc","category":"galaxy","object_type":"Barred spiral galaxy SBbc","mag":11.49,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":170295296.27042133,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":234.10945833333332,"dec_deg":-66.85974999999999,"epoch_ra_deg":234.735625,"epoch_dec_deg":-66.948603,"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":"Triangulum Australe","discovered":"1836","featured":false,"url":"https://spacecatalog.org/object/ngc-5938","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.44,"h_mag":8.53,"j_mag":9.23,"k_mag":8.3,"v_mag":11.49,"redshift":0.011745,"hubble_type":"SBbc","wikidata_id":"Q1124231","redshift_cmb":0.012080484883919551,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[15686266.599082502,15686266.599082502]},"major_axis_arcmin":2.31,"minor_axis_arcmin":1.59,"position_angle_deg":15,"surface_brightness":22.79,"radial_velocity_km_s":3500},"designations":[{"catalog":"2MASX","designation":"2MASX J15362626-6651350"},{"catalog":"ESO","designation":"ESO 099-007"},{"catalog":"ESO","designation":"ESO 99-7"},{"catalog":"IRAS","designation":"IRAS 15317-6641"},{"catalog":"LEDA","designation":"LEDA 55582"},{"catalog":"NGC","designation":"NGC 5938"},{"catalog":"PGC","designation":"PGC 55582"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"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."}