{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T17:51:25.051Z","years_from_j2000":26.67,"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":"ngc-941","name":"NGC 941","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":12.49,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":64428140.86417054,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":37.11604166666667,"dec_deg":-1.1515277777777777,"epoch_ra_deg":37.458371,"epoch_dec_deg":-1.031207,"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":"Cetus","discovered":"1785","featured":false,"url":"https://spacecatalog.org/object/ngc-941","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.04,"h_mag":10.95,"j_mag":11.4,"k_mag":10.69,"v_mag":12.49,"redshift":0.005398,"hubble_type":"SABc","wikidata_id":"Q1040375","redshift_cmb":0.004596298246242414,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14265215.763780491,14265215.763780491]},"major_axis_arcmin":1.87,"minor_axis_arcmin":1.33,"wikipedia_article":"NGC 941","position_angle_deg":171,"surface_brightness":22.85,"radial_velocity_km_s":1614},"designations":[{"catalog":"2MASX","designation":"2MASX J02282784-0109056"},{"catalog":"IRAS","designation":"IRAS 02259-0122"},{"catalog":"IRAS","designation":"IRAS F02259-0122"},{"catalog":"LEDA","designation":"LEDA 9414"},{"catalog":"MCG","designation":"MCG +00-07-022"},{"catalog":"MCG","designation":"MCG 0-7-22"},{"catalog":"NGC","designation":"NGC 941"},{"catalog":"PGC","designation":"PGC 9414"},{"catalog":"SDSS","designation":"SDSS J022827.74-010908.6"},{"catalog":"SDSS","designation":"SDSS J022827.88-010905.2"},{"catalog":"UGC","designation":"UGC 1954"}],"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."}