{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T21:54:50.010Z","years_from_j2000":26.668,"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-5705","name":"NGC 5705","class":"barred_spiral_galaxy_sbcd","category":"galaxy","object_type":"Barred spiral galaxy SBcd","mag":14.03,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":93500628.79207428,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":219.95704166666667,"dec_deg":-0.7184722222222222,"epoch_ra_deg":220.302317,"epoch_dec_deg":-0.834242,"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":"Virgo","discovered":"1884","featured":false,"url":"https://spacecatalog.org/object/ngc-5705","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.03,"h_mag":11.65,"j_mag":12.28,"k_mag":11.31,"redshift":0.0059,"hubble_type":"SBcd","wikidata_id":"Q1122248","redshift_cmb":0.006659913755739266,"discovered_by":"Édouard Stephan","ngc_type_code":"G","uncertainties":{"distance_ly":[14545229.352583708,14545229.352583708]},"major_axis_arcmin":1.35,"minor_axis_arcmin":0.6,"wikipedia_article":"NGC 5705","position_angle_deg":77,"surface_brightness":22.92,"radial_velocity_km_s":1764},"designations":[{"catalog":"2MASX","designation":"2MASX J14394969-0043061"},{"catalog":"IRAS","designation":"IRAS 14371-0029"},{"catalog":"IRAS","designation":"IRAS F14372-0030"},{"catalog":"LEDA","designation":"LEDA 52395"},{"catalog":"MCG","designation":"MCG +00-37-021"},{"catalog":"NGC","designation":"NGC 5705"},{"catalog":"PGC","designation":"PGC 52395"},{"catalog":"SDSS","designation":"SDSS J143949.46-004309.5"},{"catalog":"SDSS","designation":"SDSS J143949.68-004306.4"},{"catalog":"UGC","designation":"UGC 9447"}],"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."}