{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T09:32:06.619Z","years_from_j2000":26.666,"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-950","name":"NGC 950","class":"barred_spiral_galaxy_sbb","category":"galaxy","object_type":"Barred spiral galaxy SBb","mag":14.48,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":212038272.4638866,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":37.29904166666667,"dec_deg":-11.024694444444446,"epoch_ra_deg":37.625767,"epoch_dec_deg":-10.904651,"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":"1886","featured":false,"url":"https://spacecatalog.org/object/ngc-950","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.48,"h_mag":11.1,"j_mag":11.74,"k_mag":10.78,"redshift":0.015775,"hubble_type":"SBb","wikidata_id":"Q1040447","redshift_cmb":0.015008748376642567,"discovered_by":"Ormond Stone","ngc_type_code":"G","uncertainties":{"distance_ly":[16517702.671481792,16517702.671481792]},"major_axis_arcmin":1.18,"minor_axis_arcmin":0.63,"wikipedia_article":"NGC 950","position_angle_deg":47,"surface_brightness":23.23,"radial_velocity_km_s":4692},"designations":[{"catalog":"2MASX","designation":"2MASX J02291177-1101287"},{"catalog":"IRAS","designation":"IRAS F02267-1114"},{"catalog":"LEDA","designation":"LEDA 9461"},{"catalog":"MCG","designation":"MCG -02-07-021"},{"catalog":"NGC","designation":"NGC 950"},{"catalog":"PGC","designation":"PGC 9461"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}