{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T19:44:39.389Z","years_from_j2000":26.673,"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-5707","name":"NGC 5707","class":"spiral_galaxy_sab","category":"galaxy","object_type":"Spiral galaxy Sab","mag":13.21,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":109069303.59215653,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":219.37820833333336,"dec_deg":51.56186111111111,"epoch_ra_deg":219.604958,"epoch_dec_deg":51.445033,"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":"1878","featured":false,"url":"https://spacecatalog.org/object/ngc-5707","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.21,"h_mag":9.67,"j_mag":10.36,"k_mag":9.44,"redshift":0.007402,"hubble_type":"Sab","wikidata_id":"Q1122256","redshift_cmb":0.007762381355316705,"discovered_by":"Lewis A. Swift","ngc_type_code":"G","uncertainties":{"distance_ly":[14731293.795733126,14731293.795733126]},"major_axis_arcmin":2.38,"minor_axis_arcmin":0.6,"position_angle_deg":33,"surface_brightness":23.18,"radial_velocity_km_s":2211},"designations":[{"catalog":"LEDA","designation":"LEDA 52266"},{"catalog":"MCG","designation":"MCG +09-24-023"},{"catalog":"NGC","designation":"NGC 5707"},{"catalog":"NGC","designation":"NGC 5707-1"},{"catalog":"NGC","designation":"NGC 5707SW"},{"catalog":"PGC","designation":"PGC 52266"},{"catalog":"SDSS","designation":"SDSS J143730.76+513342.6"},{"catalog":"SDSS","designation":"SDSS J143730.77+513342.7"},{"catalog":"UGC","designation":"UGC 9428"}],"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."}