{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T00:10:13.481Z","years_from_j2000":26.674,"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-5752","name":"NGC 5752","class":"intermediate_spiral_galaxy_sabb","category":"galaxy","object_type":"Intermediate spiral galaxy SABb","mag":15.16,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":220973446.1618119,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":221.309,"dec_deg":38.728861111111115,"epoch_ra_deg":221.575255,"epoch_dec_deg":38.615275,"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":"1878","featured":false,"url":"https://spacecatalog.org/object/ngc-5752","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.16,"h_mag":12.06,"j_mag":12.71,"k_mag":11.86,"redshift":0.01515,"hubble_type":"SABb","wikidata_id":"Q735513","redshift_cmb":0.015633913632570273,"discovered_by":"Lawrence Parsons, 4th Earl of Rosse","ngc_type_code":"G","uncertainties":{"distance_ly":[16712279.087854035,16712279.087854035]},"major_axis_arcmin":0.77,"minor_axis_arcmin":0.24,"wikipedia_article":"NGC 5752","position_angle_deg":122,"surface_brightness":22.82,"radial_velocity_km_s":4507},"designations":[{"catalog":"2MASX","designation":"2MASX J14451411+3843436"},{"catalog":"IRAS","designation":"IRAS 14432+3856"},{"catalog":"IRAS","designation":"IRAS F14432+3856"},{"catalog":"LEDA","designation":"LEDA 52685"},{"catalog":"MCG","designation":"MCG +07-30-060"},{"catalog":"NGC","designation":"NGC 5752"},{"catalog":"PGC","designation":"PGC 52685"},{"catalog":"SDSS","designation":"SDSS J144514.15+384343.8"},{"catalog":"SDSS","designation":"SDSS J144514.16+384343.8"},{"catalog":"SDSS","designation":"SDSS J144514.16+384343.9"},{"catalog":"UGC","designation":"UGC 09505 NOTES01"}],"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."}