{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T09:11:50.514Z","years_from_j2000":26.686,"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-6247","name":"NGC 6247","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":13.81,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":210524538.0811793,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":252.08433333333335,"dec_deg":62.976416666666665,"epoch_ra_deg":252.151175,"epoch_dec_deg":62.928281,"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":"Draco","discovered":"1862","featured":false,"url":"https://spacecatalog.org/object/ngc-6247","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.81,"h_mag":10.62,"j_mag":11.3,"k_mag":10.32,"redshift":0.01498,"hubble_type":"Sb","wikidata_id":"Q2085674","redshift_cmb":0.014902780426481854,"discovered_by":"Heinrich Louis d'Arrest","ngc_type_code":"G","uncertainties":{"distance_ly":[16485289.470434453,16485289.470434453]},"major_axis_arcmin":0.89,"minor_axis_arcmin":0.28,"position_angle_deg":56,"surface_brightness":21.49,"radial_velocity_km_s":4457},"designations":[{"catalog":"2MASX","designation":"2MASX J16482023+6258348"},{"catalog":"IC","designation":"IC 1233"},{"catalog":"IRAS","designation":"IRAS 16478+6303"},{"catalog":"IRAS","designation":"IRAS F16478+6303"},{"catalog":"LEDA","designation":"LEDA 59023"},{"catalog":"NGC","designation":"NGC 6247"},{"catalog":"PGC","designation":"PGC 59023"},{"catalog":"SDSS","designation":"SDSS J164820.24+625835.1"},{"catalog":"SDSS","designation":"SDSS J164820.24+625835.4"},{"catalog":"SDSS","designation":"SDSS J164820.25+625835.1"},{"catalog":"SDSS","designation":"SDSS J164820.25+625835.2"},{"catalog":"UGC","designation":"UGC 10572"}],"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."}