{"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":"2026-09-02T18:23:52.123Z","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-5992","name":"NGC 5992","class":"barred_spiral_galaxy_sbb","category":"galaxy","object_type":"Barred spiral galaxy SBb","mag":13.97,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":458344080.14393824,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":236.08962499999998,"dec_deg":41.08636111111112,"epoch_ra_deg":236.326606,"epoch_dec_deg":41.001311,"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":"Boötes","discovered":"1787","featured":false,"url":"https://spacecatalog.org/object/ngc-5992","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.52,"h_mag":11.8,"j_mag":12.21,"k_mag":11.3,"v_mag":13.97,"redshift":0.031785,"hubble_type":"SBb","wikidata_id":"Q1124696","redshift_cmb":0.032038325052747396,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[23364381.82021105,23364381.82021105]},"major_axis_arcmin":0.69,"minor_axis_arcmin":0.47,"position_angle_deg":156,"surface_brightness":22.19,"radial_velocity_km_s":9378},"designations":[{"catalog":"2MASX","designation":"2MASX J15442146+4105110"},{"catalog":"IRAS","designation":"IRAS 15425+4114"},{"catalog":"IRAS","designation":"IRAS F15426+4115"},{"catalog":"LEDA","designation":"LEDA 55913"},{"catalog":"MCG","designation":"MCG +07-32-049"},{"catalog":"NGC","designation":"NGC 5992"},{"catalog":"PGC","designation":"PGC 55913"},{"catalog":"SDSS","designation":"SDSS J154421.51+410510.9"},{"catalog":"UGC","designation":"UGC 10003"}],"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."}