{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T02:18:52.909Z","years_from_j2000":26.674,"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-1104","name":"NGC 1104","class":"spiral_galaxy_sa","category":"galaxy","object_type":"Spiral galaxy Sa","mag":14.58,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":297561099.09693635,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":42.161208333333335,"dec_deg":-0.27152777777777776,"epoch_ra_deg":42.504914,"epoch_dec_deg":-0.159466,"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":"1864","featured":false,"url":"https://spacecatalog.org/object/ngc-1104","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.58,"h_mag":10.76,"j_mag":11.47,"k_mag":10.45,"redshift":0.0217,"hubble_type":"Sa","wikidata_id":"Q1041572","redshift_cmb":0.020969225875429043,"discovered_by":"Heinrich Louis d'Arrest","ngc_type_code":"G","uncertainties":{"distance_ly":[18583454.17989786,18583454.17989786]},"major_axis_arcmin":1.04,"minor_axis_arcmin":0.62,"position_angle_deg":150,"surface_brightness":23.34,"radial_velocity_km_s":6435},"designations":[{"catalog":"2MASX","designation":"2MASX J02483872-0016169"},{"catalog":"IRAS","designation":"IRAS 02461-0028"},{"catalog":"LEDA","designation":"LEDA 10634"},{"catalog":"MCG","designation":"MCG +00-08-019"},{"catalog":"NGC","designation":"NGC 1104"},{"catalog":"PGC","designation":"PGC 10634"},{"catalog":"SDSS","designation":"SDSS J024838.69-001617.4"},{"catalog":"SDSS","designation":"SDSS J024838.69-001617.5"},{"catalog":"UGC","designation":"UGC 2287"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","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."}