{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T14:51:30.018Z","years_from_j2000":26.681,"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-5934","name":"NGC 5934","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":14.44,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":267144416.11422712,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":232.05325000000002,"dec_deg":42.929916666666664,"epoch_ra_deg":232.28906,"epoch_dec_deg":42.836379,"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":"Boötes","discovered":"1880","featured":false,"url":"https://spacecatalog.org/object/ngc-5934","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.44,"h_mag":10.3,"j_mag":11.02,"k_mag":9.98,"redshift":0.01856,"hubble_type":"SBa","wikidata_id":"Q1124191","redshift_cmb":0.018855269830258425,"discovered_by":"Édouard Stephan","ngc_type_code":"G","uncertainties":{"distance_ly":[17799931.65221408,17799931.65221408]},"major_axis_arcmin":0.61,"minor_axis_arcmin":0.29,"position_angle_deg":5,"surface_brightness":21.77,"radial_velocity_km_s":5513},"designations":[{"catalog":"2MASX","designation":"2MASX J15281276+4255474"},{"catalog":"IRAS","designation":"IRAS 15264+4306"},{"catalog":"LEDA","designation":"LEDA 55178"},{"catalog":"MCG","designation":"MCG +07-32-011"},{"catalog":"NGC","designation":"NGC 5934"},{"catalog":"PGC","designation":"PGC 55178"},{"catalog":"SDSS","designation":"SDSS J152812.74+425547.6"},{"catalog":"SDSS","designation":"SDSS J152812.75+425547.5"},{"catalog":"SDSS","designation":"SDSS J152812.76+425547.6"},{"catalog":"SDSS","designation":"SDSS J152812.77+425547.7"},{"catalog":"SDSS","designation":"SDSS J152812.78+425547.7"},{"catalog":"UGC","designation":"UGC 9862"}],"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."}