{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T12:27:12.494Z","years_from_j2000":26.672,"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-6300","name":"NGC 6300","class":"barred_spiral_galaxy_sbb","category":"galaxy","object_type":"Barred spiral galaxy SBb","mag":10.27,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":53281299.58484301,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":259.24779166666667,"dec_deg":-62.82055555555556,"epoch_ra_deg":259.87753,"epoch_dec_deg":-62.849895,"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":"Ara","discovered":"1826","featured":false,"url":"https://spacecatalog.org/object/ngc-6300","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.96,"h_mag":7.2,"j_mag":7.86,"k_mag":6.93,"v_mag":10.27,"redshift":0.003683,"hubble_type":"SBb","wikidata_id":"Q1998308","redshift_cmb":0.003803370984321486,"discovered_by":"James Dunlop","ngc_type_code":"G","uncertainties":{"distance_ly":[14182042.772444053,14182042.772444053]},"major_axis_arcmin":5.33,"minor_axis_arcmin":3.37,"wikipedia_article":"NGC 6300","position_angle_deg":119,"surface_brightness":23,"radial_velocity_km_s":1102},"designations":[{"catalog":"2MASX","designation":"2MASX J17165947-6249139"},{"catalog":"ESO","designation":"ESO 101-025"},{"catalog":"ESO","designation":"ESO 101-25"},{"catalog":"ESO-LV","designation":"ESO-LV 101-0250"},{"catalog":"IRAS","designation":"IRAS 17123-6245"},{"catalog":"IRAS","designation":"IRAS F17123-6245"},{"catalog":"LEDA","designation":"LEDA 60001"},{"catalog":"NGC","designation":"NGC 6300"},{"catalog":"PGC","designation":"PGC 60001"}],"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."}