{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T17:13:57.697Z","years_from_j2000":26.678,"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-5750","name":"NGC 5750","class":"lenticular_galaxy_s0_a","category":"galaxy","object_type":"Lenticular galaxy S0-a","mag":11.69,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":88017350.05324446,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":221.54633333333337,"dec_deg":-0.22294444444444445,"epoch_ra_deg":221.890975,"epoch_dec_deg":-0.336087,"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":"Virgo","discovered":"1787","featured":false,"url":"https://spacecatalog.org/object/ngc-5750","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.55,"h_mag":8.64,"j_mag":9.39,"k_mag":8.44,"v_mag":11.69,"redshift":0.00554,"hubble_type":"S0-a","wikidata_id":"Q1122597","redshift_cmb":0.00627119083403338,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14485591.710409738,14485591.710409738]},"major_axis_arcmin":2.65,"minor_axis_arcmin":1.37,"wikipedia_article":"NGC 5750","position_angle_deg":70,"surface_brightness":23.2,"radial_velocity_km_s":1656},"designations":[{"catalog":"2MASX","designation":"2MASX J14461110-0013229"},{"catalog":"IRAS","designation":"IRAS 14436-0000"},{"catalog":"IRAS","designation":"IRAS F14436-0000"},{"catalog":"LEDA","designation":"LEDA 52735"},{"catalog":"MCG","designation":"MCG +00-38-006"},{"catalog":"NGC","designation":"NGC 5750"},{"catalog":"PGC","designation":"PGC 52735"},{"catalog":"SDSS","designation":"SDSS J144611.12-001322.5"},{"catalog":"SDSS","designation":"SDSS J144611.12-001322.6"},{"catalog":"SDSS","designation":"SDSS J144611.12-001322.8"},{"catalog":"SDSS","designation":"SDSS J144611.13-001322.7"},{"catalog":"UGC","designation":"UGC 9512"}],"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."}