{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.663","julian_year":2026.663,"time":"2026-08-31T06:44:59.794Z","years_from_j2000":26.663,"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-2341","name":"IC 2341","class":"elliptical_galaxy_e_s0","category":"galaxy","object_type":"Elliptical galaxy E-S0","mag":14.64,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":253801265.04233235,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":125.92266666666667,"dec_deg":21.43488888888889,"epoch_ra_deg":126.314462,"epoch_dec_deg":21.34867,"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":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-2341","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.64,"h_mag":10.6,"j_mag":11.25,"k_mag":10.31,"redshift":0.01712,"hubble_type":"E-S0","wikidata_id":"Q3690432","redshift_cmb":0.017925870406354516,"ngc_type_code":"G","uncertainties":{"distance_ly":[17472237.233502798,17472237.233502798]},"major_axis_arcmin":1.18,"minor_axis_arcmin":0.57,"position_angle_deg":3,"surface_brightness":23.78,"radial_velocity_km_s":5089},"designations":[{"catalog":"2MASX","designation":"2MASX J08234141+2126048"},{"catalog":"IC","designation":"IC 2341"},{"catalog":"LEDA","designation":"LEDA 23552"},{"catalog":"MCG","designation":"MCG +04-20-046"},{"catalog":"PGC","designation":"PGC 23552"},{"catalog":"SDSS","designation":"SDSS J082341.44+212605.5"},{"catalog":"SDSS","designation":"SDSS J082341.45+212605.6"},{"catalog":"UGC","designation":"UGC 4384"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}