{"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":"2026-09-02T05:04:25.479Z","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-5118","name":"IC 5118","class":"spiral_galaxy_sc","category":"galaxy","object_type":"Spiral galaxy Sc","mag":15.49,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":377493291.51923,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":325.5575,"dec_deg":-71.38269444444444,"epoch_ra_deg":326.15531,"epoch_dec_deg":-71.260284,"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":"Indus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-5118","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.49,"h_mag":11.64,"j_mag":12.38,"k_mag":11.49,"redshift":0.02672,"hubble_type":"Sc","wikidata_id":"Q3680480","redshift_cmb":0.02649398733078212,"ngc_type_code":"G","uncertainties":{"distance_ly":[20846219.61384119,20846219.61384119]},"major_axis_arcmin":1.22,"minor_axis_arcmin":0.31,"position_angle_deg":45,"surface_brightness":23.49,"radial_velocity_km_s":7902},"designations":[{"catalog":"2MASX","designation":"2MASX J21421380-7122578"},{"catalog":"ESO","designation":"ESO 075-020"},{"catalog":"ESO","designation":"ESO 75-20"},{"catalog":"ESO-LV","designation":"ESO-LV 75-0200"},{"catalog":"IC","designation":"IC 5118"},{"catalog":"LEDA","designation":"LEDA 67202"},{"catalog":"PGC","designation":"PGC 67202"}],"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."}