{"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":"2026-09-02T12:10:24.983Z","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-1964","name":"NGC 1964","class":"intermediate_spiral_galaxy_sabb","category":"galaxy","object_type":"Intermediate spiral galaxy SABb","mag":10.91,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":79987207.66565312,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":83.34066666666666,"dec_deg":-21.945777777777778,"epoch_ra_deg":83.624975,"epoch_dec_deg":-21.926522,"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":"Lepus","discovered":"1784","featured":false,"url":"https://spacecatalog.org/object/ngc-1964","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.53,"h_mag":7.93,"j_mag":8.65,"k_mag":7.68,"v_mag":10.91,"redshift":0.005538,"hubble_type":"SABb","wikidata_id":"Q1046222","redshift_cmb":0.0057015045984072366,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14403918.35753517,14403918.35753517]},"major_axis_arcmin":5.16,"minor_axis_arcmin":2.33,"wikipedia_article":"NGC 1964","position_angle_deg":31,"surface_brightness":23.25,"radial_velocity_km_s":1656},"designations":[{"catalog":"2MASX","designation":"2MASX J05332175-2156447"},{"catalog":"ESO","designation":"ESO 554-010"},{"catalog":"ESO","designation":"ESO 554-10"},{"catalog":"ESO-LV","designation":"ESO-LV 554-0100"},{"catalog":"IRAS","designation":"IRAS 0531-219P05"},{"catalog":"IRAS","designation":"IRAS 05312-2158"},{"catalog":"IRAS","designation":"IRAS F05312-2158"},{"catalog":"LEDA","designation":"LEDA 17436"},{"catalog":"MCG","designation":"MCG -04-14-003"},{"catalog":"NGC","designation":"NGC 1964"},{"catalog":"PGC","designation":"PGC 17436"}],"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."}