{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T00:37:57.446Z","years_from_j2000":26.671,"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-2502","name":"NGC 2502","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":11.96,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":58161027.642902255,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":118.96466666666666,"dec_deg":-52.306777777777775,"epoch_ra_deg":119.137919,"epoch_dec_deg":-52.377354,"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":"Carina","discovered":"1837","featured":false,"url":"https://spacecatalog.org/object/ngc-2502","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.19,"h_mag":8.16,"j_mag":8.94,"k_mag":7.87,"v_mag":11.96,"redshift":0.003539,"hubble_type":"S0","wikidata_id":"Q1049432","redshift_cmb":0.004150605865709478,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14216768.864017136,14216768.864017136]},"major_axis_arcmin":2.21,"minor_axis_arcmin":1.12,"position_angle_deg":118,"surface_brightness":23.61,"radial_velocity_km_s":1059},"designations":[{"catalog":"2MASX","designation":"2MASX J07555149-5218242"},{"catalog":"ESO","designation":"ESO 209-008"},{"catalog":"ESO","designation":"ESO 209-8"},{"catalog":"ESO-LV","designation":"ESO-LV 209-0080"},{"catalog":"LEDA","designation":"LEDA 22210"},{"catalog":"NGC","designation":"NGC 2502"},{"catalog":"PGC","designation":"PGC 22210"}],"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."}