{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T13:15:05.959Z","years_from_j2000":26.675,"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-7183","name":"NGC 7183","class":"lenticular_galaxy_s0_a","category":"galaxy","object_type":"Lenticular galaxy S0-a","mag":12.94,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":108602693.67376572,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":330.5900833333334,"dec_deg":-18.9165,"epoch_ra_deg":330.959791,"epoch_dec_deg":-18.787137,"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":"Aquarius","discovered":"1786","featured":false,"url":"https://spacecatalog.org/object/ngc-7183","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.94,"h_mag":8.64,"j_mag":9.45,"k_mag":8.38,"redshift":0.008796,"hubble_type":"S0-a","wikidata_id":"Q1150045","redshift_cmb":0.007729365664727705,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14725363.364122547,14725363.364122547]},"major_axis_arcmin":3.89,"minor_axis_arcmin":1.14,"position_angle_deg":82,"surface_brightness":24.5,"radial_velocity_km_s":2626},"designations":[{"catalog":"2MASX","designation":"2MASX J22022161-1854596"},{"catalog":"ESO","designation":"ESO 601-008"},{"catalog":"ESO","designation":"ESO 601-8"},{"catalog":"ESO-LV","designation":"ESO-LV 601-0080"},{"catalog":"IRAS","designation":"IRAS 21596-1909"},{"catalog":"LEDA","designation":"LEDA 67892"},{"catalog":"MCG","designation":"MCG -03-56-004"},{"catalog":"NGC","designation":"NGC 7183"},{"catalog":"PGC","designation":"PGC 67892"}],"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."}