{"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":"2026-09-03T12:54:20.527Z","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-3133","name":"NGC 3133","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":15.73,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":452479088.09470576,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":151.80337500000002,"dec_deg":-11.965305555555554,"epoch_ra_deg":152.132022,"epoch_dec_deg":-12.09618,"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":"Hydra","discovered":"1886","featured":false,"url":"https://spacecatalog.org/object/ngc-3133","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.73,"h_mag":12.42,"j_mag":13.01,"k_mag":12.31,"redshift":0.03042,"hubble_type":"Sb","wikidata_id":"Q1103088","redshift_cmb":0.031637591057454895,"discovered_by":"Francis Preserved Leavenworth","ngc_type_code":"G","uncertainties":{"distance_ly":[23175527.639714684,23175527.639714684]},"major_axis_arcmin":0.68,"minor_axis_arcmin":0.29,"position_angle_deg":27,"radial_velocity_km_s":8980},"designations":[{"catalog":"2MASX","designation":"2MASX J10071281-1157553"},{"catalog":"LEDA","designation":"LEDA 29417"},{"catalog":"NGC","designation":"NGC 3133"},{"catalog":"PGC","designation":"PGC 29417"}],"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."}