{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T21:07:13.724Z","years_from_j2000":26.654,"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-16","name":"NGC 16","class":"elliptical_galaxy_e_s0","category":"galaxy","object_type":"Elliptical galaxy E-S0","mag":12,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":127752010.84665875,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":2.267875,"dec_deg":27.729416666666665,"epoch_ra_deg":2.613958,"epoch_dec_deg":27.878824,"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":"Pegasus","discovered":"1784","featured":false,"url":"https://spacecatalog.org/object/ngc-16","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13,"h_mag":9.06,"j_mag":9.75,"k_mag":8.78,"v_mag":12,"redshift":0.010214,"hubble_type":"E-S0","wikidata_id":"Q34400","redshift_cmb":0.009082967860194247,"discovered_by":"John Frederick William Herschel, William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14986184.576596668,14986184.576596668]},"major_axis_arcmin":1.74,"minor_axis_arcmin":0.85,"wikipedia_article":"NGC 16","position_angle_deg":17,"surface_brightness":22.91,"radial_velocity_km_s":3046},"designations":[{"catalog":"2MASX","designation":"2MASX J00090429+2743460"},{"catalog":"LEDA","designation":"LEDA 660"},{"catalog":"MCG","designation":"MCG +04-01-032"},{"catalog":"NGC","designation":"NGC 16"},{"catalog":"PGC","designation":"PGC 660"},{"catalog":"UGC","designation":"UGC 80"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}