{"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":"2026-09-03T18:14:04.443Z","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-297","name":"NGC 297","class":"elliptical_galaxy_e","category":"galaxy","object_type":"Elliptical galaxy E","mag":16.88,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":719361439.2289488,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":13.745583333333334,"dec_deg":-7.349666666666667,"epoch_ra_deg":14.085338,"epoch_dec_deg":-7.204007,"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":"Cetus","discovered":"1864","featured":false,"url":"https://spacecatalog.org/object/ngc-297","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.88,"h_mag":12.5,"j_mag":13.23,"k_mag":12.09,"redshift":0.05078,"hubble_type":"E","wikidata_id":"Q1036055","redshift_cmb":0.049651144101155786,"discovered_by":"Albert Marth","ngc_type_code":"G","uncertainties":{"distance_ly":[32404348.61320724,32404348.61320724]},"major_axis_arcmin":0.35,"minor_axis_arcmin":0.29,"wikipedia_article":"NGC 297","position_angle_deg":101,"surface_brightness":23.5,"radial_velocity_km_s":14837},"designations":[{"catalog":"2MASX","designation":"2MASX J00545892-0720591"},{"catalog":"LEDA","designation":"LEDA 1020464"},{"catalog":"LEDA","designation":"LEDA 3243"},{"catalog":"NGC","designation":"NGC 297"},{"catalog":"PGC","designation":"PGC 1020464"},{"catalog":"PGC","designation":"PGC 3243"}],"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."}