{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T07:51:45.980Z","years_from_j2000":26.685,"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-5525","name":"NGC 5525","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":12.84,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":272852990.2528456,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":213.91345833333335,"dec_deg":14.282611111111112,"epoch_ra_deg":214.236993,"epoch_dec_deg":14.157407,"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":"1883","featured":false,"url":"https://spacecatalog.org/object/ngc-5525","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.8,"h_mag":9.77,"j_mag":10.51,"k_mag":9.44,"v_mag":12.84,"redshift":0.01845,"hubble_type":"S0","wikidata_id":"Q1120740","redshift_cmb":0.019252509562044606,"discovered_by":"Édouard Stephan","ngc_type_code":"G","uncertainties":{"distance_ly":[17943216.190456588,17943216.190456588]},"major_axis_arcmin":1.21,"minor_axis_arcmin":0.66,"position_angle_deg":21,"surface_brightness":22.92,"radial_velocity_km_s":5480},"designations":[{"catalog":"2MASX","designation":"2MASX J14153923+1416576"},{"catalog":"LEDA","designation":"LEDA 50946"},{"catalog":"MCG","designation":"MCG +03-36-096"},{"catalog":"NGC","designation":"NGC 5525"},{"catalog":"PGC","designation":"PGC 50946"},{"catalog":"SDSS","designation":"SDSS J141539.22+141657.4"},{"catalog":"UGC","designation":"UGC 9124"}],"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."}