{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T05:21:05.762Z","years_from_j2000":26.666,"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-4662","name":"IC 4662","class":"irregular_galaxy_ib","category":"galaxy","object_type":"Irregular galaxy IB","mag":11.1,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":266.78695833333336,"dec_deg":-64.64175,"epoch_ra_deg":267.445715,"epoch_dec_deg":-64.651584,"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":"Pavo","discovered":"1901","featured":false,"url":"https://spacecatalog.org/object/ic-4662","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.8,"h_mag":9.76,"j_mag":10.1,"k_mag":9.51,"v_mag":11.1,"redshift":0.001008,"hubble_type":"IB","wikidata_id":"Q3058038","redshift_cmb":0.0010621898296658827,"discovered_by":"Robert T. A. Innes","ngc_type_code":"G","major_axis_arcmin":2.09,"minor_axis_arcmin":0.83,"wikipedia_article":"IC 4662","position_angle_deg":106,"surface_brightness":21.34,"radial_velocity_km_s":302},"designations":[{"catalog":"2MASX","designation":"2MASX J17470919-6438192"},{"catalog":"2MASX","designation":"2MASX J17471068-6438207"},{"catalog":"ESO","designation":"ESO 102-014"},{"catalog":"ESO","designation":"ESO 102-14"},{"catalog":"ESO-LV","designation":"ESO-LV 102-0140"},{"catalog":"IC","designation":"IC 4662"},{"catalog":"IRAS","designation":"IRAS 17422-6437"},{"catalog":"IRAS","designation":"IRAS F17422-6437"},{"catalog":"LEDA","designation":"LEDA 60849"},{"catalog":"LEDA","designation":"LEDA 60851"},{"catalog":"PGC","designation":"PGC 60849"},{"catalog":"PGC","designation":"PGC 60851"}],"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."}