{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T06:02:42.086Z","years_from_j2000":26.669,"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":"ic-2174","name":"IC 2174","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":13.55,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":178648523.0674697,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":107.27337500000002,"dec_deg":75.35302777777777,"epoch_ra_deg":108.163996,"epoch_dec_deg":75.309736,"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":"Camelopardalis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-2174","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.39,"h_mag":10.68,"j_mag":11.37,"k_mag":10.42,"v_mag":13.55,"redshift":0.01266,"hubble_type":"SBa","wikidata_id":"Q3691880","redshift_cmb":0.012667475607555545,"ngc_type_code":"G","uncertainties":{"distance_ly":[15841864.892233081,15841864.892233081]},"major_axis_arcmin":0.78,"minor_axis_arcmin":0.78,"position_angle_deg":125,"surface_brightness":22.6,"radial_velocity_km_s":3770},"designations":[{"catalog":"2MASX","designation":"2MASX J07090560+7521108"},{"catalog":"IC","designation":"IC 2174"},{"catalog":"IRAS","designation":"IRAS F07023+7526"},{"catalog":"LEDA","designation":"LEDA 20252"},{"catalog":"MCG","designation":"MCG +13-06-002"},{"catalog":"PGC","designation":"PGC 20252"},{"catalog":"UGC","designation":"UGC 3666"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}