{"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":"2026-09-03T06:51:57.575Z","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-6744","name":"NGC 6744","class":"spiral_galaxy_sbc","category":"galaxy","object_type":"Spiral galaxy Sbc","mag":9.25,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":37341404.80442683,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":287.4420833333333,"dec_deg":-63.857527777777776,"epoch_ra_deg":288.077327,"epoch_dec_deg":-63.814119,"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":"Pavo","discovered":"1826","featured":false,"url":"https://spacecatalog.org/object/ngc-6744","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":9.14,"h_mag":6.2,"j_mag":6.73,"k_mag":5.94,"v_mag":9.25,"redshift":0.0028,"hubble_type":"Sbc","wikidata_id":"Q279134","redshift_cmb":0.002667836709164595,"also_known_as":["Pavo Galaxy"],"discovered_by":"James Dunlop","ngc_type_code":"G","uncertainties":{"distance_ly":[14087126.941994876,14087126.941994876]},"major_axis_arcmin":15.67,"minor_axis_arcmin":9.75,"wikipedia_article":"NGC 6744","position_angle_deg":15,"surface_brightness":23.47,"radial_velocity_km_s":838},"designations":[{"catalog":"2MASX","designation":"2MASX J19094609-6351271"},{"catalog":"Caldwell","designation":"C 101"},{"catalog":"ESO","designation":"ESO 104-042"},{"catalog":"ESO","designation":"ESO 104-42"},{"catalog":"ESO-LV","designation":"ESO-LV 104-0420"},{"catalog":"IRAS","designation":"IRAS 19051-6357"},{"catalog":"IRAS","designation":"IRAS F19049-6357"},{"catalog":"LEDA","designation":"LEDA 62836"},{"catalog":"NGC","designation":"NGC 6744"},{"catalog":"PGC","designation":"PGC 62836"}],"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."}