{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T16:22:18.273Z","years_from_j2000":26.673,"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-1667","name":"NGC 1667","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":12.15,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":213285938.3681549,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":72.15474999999999,"dec_deg":-6.319972222222222,"epoch_ra_deg":72.48317,"epoch_dec_deg":-6.272382,"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":"Eridanus","discovered":"1884","featured":false,"url":"https://spacecatalog.org/object/ngc-1667","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.77,"h_mag":9.18,"j_mag":9.92,"k_mag":8.9,"v_mag":12.15,"redshift":0.015204,"hubble_type":"SABc","wikidata_id":"Q1027632","redshift_cmb":0.015096077989196655,"discovered_by":"Édouard Stephan","ngc_type_code":"G","uncertainties":{"distance_ly":[16544539.749334237,16544539.749334237]},"major_axis_arcmin":1.89,"minor_axis_arcmin":1.47,"wikipedia_article":"NGC 1667","position_angle_deg":3,"surface_brightness":22.68,"radial_velocity_km_s":4523},"designations":[{"catalog":"2MASX","designation":"2MASX J04483720-0619114"},{"catalog":"IRAS","designation":"IRAS 04461-0624"},{"catalog":"IRAS","designation":"IRAS F04461-0624"},{"catalog":"LEDA","designation":"LEDA 16062"},{"catalog":"MCG","designation":"MCG -01-13-013"},{"catalog":"NGC","designation":"NGC 1667"},{"catalog":"NGC","designation":"NGC 1689"},{"catalog":"PGC","designation":"PGC 16062"},{"catalog":"SDSS","designation":"SDSS J044837.18-061911.9"}],"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."}