{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T16:35:12.114Z","years_from_j2000":26.67,"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-292","name":"Small Magellanic Cloud","class":"barred_spiral_galaxy_sbm","category":"galaxy","object_type":"Barred spiral galaxy SBm","mag":2.3,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":13.186583333333333,"dec_deg":-72.8286111111111,"epoch_ra_deg":13.426985,"epoch_dec_deg":-72.682618,"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":"Tucana","discovered":"1521","featured":false,"url":"https://spacecatalog.org/object/ngc-292","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":2.75,"v_mag":2.3,"redshift":0.000486,"hubble_type":"SBm","wikidata_id":"Q49984","redshift_cmb":0.00030141338021838493,"also_known_as":["SMC"],"discovered_by":"Ferdinand Magellan","ngc_type_code":"G","major_axis_arcmin":299.92,"minor_axis_arcmin":179.89,"wikipedia_article":"Small Magellanic Cloud","position_angle_deg":45,"surface_brightness":23.42,"radial_velocity_km_s":146},"designations":[{"catalog":"Common name","designation":"Small Magellanic Cloud"},{"catalog":"ESO","designation":"ESO 029-021"},{"catalog":"ESO","designation":"ESO 29-21"},{"catalog":"LEDA","designation":"LEDA 3085"},{"catalog":"NGC","designation":"NGC 292"},{"catalog":"PGC","designation":"PGC 3085"}],"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."}