{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T09:40:38.322Z","years_from_j2000":26.675,"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-5519","name":"NGC 5519","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":14.51,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":365819066.9056242,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":213.5869583333333,"dec_deg":7.515916666666667,"epoch_ra_deg":213.920433,"epoch_dec_deg":7.390337,"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":"1784","featured":false,"url":"https://spacecatalog.org/object/ngc-5519","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.51,"h_mag":11.23,"j_mag":11.92,"k_mag":10.88,"redshift":0.02484,"hubble_type":"SBa","wikidata_id":"Q3392658","redshift_cmb":0.025689810049990713,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[20499797.56437376,20499797.56437376]},"major_axis_arcmin":1.77,"minor_axis_arcmin":1.08,"position_angle_deg":76,"surface_brightness":24.23,"radial_velocity_km_s":7354},"designations":[{"catalog":"2MASX","designation":"2MASX J14142084+0730575"},{"catalog":"IRAS","designation":"IRAS F14118+0744"},{"catalog":"LEDA","designation":"LEDA 50865"},{"catalog":"LEDA","designation":"LEDA 51185"},{"catalog":"MCG","designation":"MCG +01-36-025"},{"catalog":"NGC","designation":"NGC 5519"},{"catalog":"NGC","designation":"NGC 5570"},{"catalog":"PGC","designation":"PGC 50865"},{"catalog":"PGC","designation":"PGC 51185"},{"catalog":"SDSS","designation":"SDSS J141420.86+073057.2"},{"catalog":"SDSS","designation":"SDSS J141420.86+073057.3"},{"catalog":"UGC","designation":"UGC 9111"}],"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."}