{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T08:45:58.656Z","years_from_j2000":26.669,"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-927","name":"NGC 927","class":"barred_spiral_galaxy_sbc","category":"galaxy","object_type":"Barred spiral galaxy SBc","mag":14.44,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":380269963.8195432,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":36.65545833333334,"dec_deg":12.155333333333333,"epoch_ra_deg":37.018466,"epoch_dec_deg":12.276345,"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":"Aries","discovered":"1885","featured":false,"url":"https://spacecatalog.org/object/ngc-927","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.44,"h_mag":10.53,"j_mag":11.22,"k_mag":10.15,"redshift":0.027529,"hubble_type":"SBc","wikidata_id":"Q1040256","redshift_cmb":0.026685122299231034,"discovered_by":"Johann Palisa","ngc_type_code":"G","uncertainties":{"distance_ly":[20929325.53200264,20929325.53200264]},"major_axis_arcmin":1.18,"minor_axis_arcmin":1.02,"position_angle_deg":0,"surface_brightness":23.38,"radial_velocity_km_s":8139},"designations":[{"catalog":"2MASX","designation":"2MASX J02263732+1209193"},{"catalog":"IRAS","designation":"IRAS 02239+1155"},{"catalog":"IRAS","designation":"IRAS F02239+1155"},{"catalog":"LEDA","designation":"LEDA 9292"},{"catalog":"MCG","designation":"MCG +02-07-009"},{"catalog":"NGC","designation":"NGC 927"},{"catalog":"PGC","designation":"PGC 9292"},{"catalog":"UGC","designation":"UGC 1908"}],"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."}