{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T09:23:11.264Z","years_from_j2000":26.683,"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-4416","name":"NGC 4416","class":"spiral_galaxy_sc","category":"galaxy","object_type":"Spiral galaxy Sc","mag":11.57,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":83818714.9808131,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":186.69466666666668,"dec_deg":7.9190000000000005,"epoch_ra_deg":187.036768,"epoch_dec_deg":7.77022,"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":"Virgo","discovered":"1825","featured":false,"url":"https://spacecatalog.org/object/ngc-4416","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.15,"h_mag":10.81,"j_mag":11.38,"k_mag":10.97,"v_mag":11.57,"redshift":0.00484,"hubble_type":"Sc","wikidata_id":"Q116217","redshift_cmb":0.005973385912537266,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14442042.39383929,14442042.39383929]},"major_axis_arcmin":1.57,"minor_axis_arcmin":1.37,"position_angle_deg":112,"surface_brightness":22.76,"radial_velocity_km_s":1447},"designations":[{"catalog":"2MASX","designation":"2MASX J12264672+0755084"},{"catalog":"IRAS","designation":"IRAS 12242+0811"},{"catalog":"IRAS","designation":"IRAS F12242+0811"},{"catalog":"LEDA","designation":"LEDA 40743"},{"catalog":"MCG","designation":"MCG +01-32-063"},{"catalog":"NGC","designation":"NGC 4416"},{"catalog":"PGC","designation":"PGC 40743"},{"catalog":"TYC","designation":"TYC 874-874-1"},{"catalog":"UGC","designation":"UGC 7541"}],"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."}