{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T05:15:05.519Z","years_from_j2000":26.671,"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-7754","name":"NGC 7754","class":"spiral_galaxy_sa","category":"galaxy","object_type":"Spiral galaxy Sa","mag":15,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":352132636.9028795,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":357.29670833333336,"dec_deg":-16.600583333333336,"epoch_ra_deg":357.643385,"epoch_dec_deg":-16.451346,"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":"1885","featured":false,"url":"https://spacecatalog.org/object/ngc-7754","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15,"redshift":0.02589,"hubble_type":"Sa","wikidata_id":"Q1169124","redshift_cmb":0.024745844301786057,"discovered_by":"Francis Preserved Leavenworth","ngc_type_code":"G","uncertainties":{"distance_ly":[20100067.257556364,20100067.257556364]},"major_axis_arcmin":0.65,"minor_axis_arcmin":0.32,"position_angle_deg":132,"radial_velocity_km_s":7661},"designations":[{"catalog":"2MASX","designation":"2MASX J23491118-1636022"},{"catalog":"IRAS","designation":"IRAS 23466-1652"},{"catalog":"IRAS","designation":"IRAS F23466-1652"},{"catalog":"LEDA","designation":"LEDA 72511"},{"catalog":"MCG","designation":"MCG -03-60-021"},{"catalog":"NGC","designation":"NGC 7754"},{"catalog":"PGC","designation":"PGC 72511"}],"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."}