{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T06:06:05.071Z","years_from_j2000":26.68,"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":"ngc2744-ned02","name":"NGC2744 NED02","class":"barred_spiral_galaxy_sbab","category":"galaxy","object_type":"Barred spiral galaxy SBab","mag":13.4,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":174440969.4993135,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":136.16250000000002,"dec_deg":18.464444444444442,"epoch_ra_deg":136.541606,"epoch_dec_deg":18.35781,"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":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ngc2744-ned02","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.85,"h_mag":11.09,"j_mag":11.72,"k_mag":10.7,"v_mag":13.4,"redshift":0.011421,"hubble_type":"SBab","redshift_cmb":0.012371869715195993,"ngc_type_code":"G","uncertainties":{"distance_ly":[15762784.03812163,15762784.03812163]},"major_axis_arcmin":1.66,"minor_axis_arcmin":0.81,"position_angle_deg":114,"surface_brightness":23.12,"radial_velocity_km_s":3404},"designations":[{"catalog":"2MASX","designation":"2MASX J09043901+1827521"},{"catalog":"IRAS","designation":"IRAS 09018+1839"},{"catalog":"MCG","designation":"MCG +03-23-031 NED02"},{"catalog":"OpenNGC","designation":"NGC2744 NED02"},{"catalog":"SDSS","designation":"SDSS J090439.00+182751.9"},{"catalog":"UGC","designation":"UGC 04757 NED02"}],"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."}