{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-06T23:34:45.781Z","years_from_j2000":26.682,"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-5485","name":"NGC 5485","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":11.5,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":94584329.85876517,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":211.7972916666667,"dec_deg":55.001694444444446,"epoch_ra_deg":212.031637,"epoch_dec_deg":54.873521,"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":"Ursa Major","discovered":"1789","featured":false,"url":"https://spacecatalog.org/object/ngc-5485","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.4,"h_mag":8.64,"j_mag":9.32,"k_mag":8.4,"v_mag":11.5,"redshift":0.00635,"hubble_type":"S0","wikidata_id":"Q1120234","redshift_cmb":0.006736713116264781,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14557383.501220223,14557383.501220223]},"major_axis_arcmin":2.51,"minor_axis_arcmin":1.75,"wikipedia_article":"NGC 5485","position_angle_deg":170,"surface_brightness":23.13,"radial_velocity_km_s":1898},"designations":[{"catalog":"2MASX","designation":"2MASX J14071131+5500054"},{"catalog":"LEDA","designation":"LEDA 50369"},{"catalog":"MCG","designation":"MCG +09-23-037"},{"catalog":"NGC","designation":"NGC 5485"},{"catalog":"PGC","designation":"PGC 50369"},{"catalog":"SDSS","designation":"SDSS J140711.33+550006.2"},{"catalog":"SDSS","designation":"SDSS J140711.34+550005.9"},{"catalog":"SDSS","designation":"SDSS J140711.34+550006.0"},{"catalog":"SDSS","designation":"SDSS J140711.35+550006.1"},{"catalog":"UGC","designation":"UGC 9033"}],"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."}