{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T09:43:13.616Z","years_from_j2000":26.664,"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-1845","name":"IC 1845","class":"double_star","category":"star","object_type":"Double star","mag":10.17,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":40.98708333333334,"dec_deg":-27.968916666666665,"epoch_ra_deg":41.279897,"epoch_dec_deg":-27.854822,"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":"Fornax","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-1845","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.78,"h_mag":8.94,"j_mag":9.2,"k_mag":8.88,"v_mag":10.17,"wds_id":"02439-2758","companions":[{"measured":2016,"magnitude":12.1,"components":null,"discoverer_code":"HDO  60","separation_arcsec":9.2,"position_angle_deg":164}],"wikidata_id":"Q3693203","ngc_type_code":"**"},"designations":[{"catalog":"ESO","designation":"ESO 416-15"},{"catalog":"IC","designation":"IC 1845"},{"catalog":"IRAS","designation":"IRAS 02434-2810"},{"catalog":"LEDA","designation":"LEDA 10441"},{"catalog":"PGC","designation":"PGC 10441"}],"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."}