{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T04:47:43.535Z","years_from_j2000":26.682,"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-3271","name":"NGC 3271","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":11.73,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":192307061.80816653,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":157.61037499999998,"dec_deg":-35.359500000000004,"epoch_ra_deg":157.912832,"epoch_dec_deg":-35.497078,"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":"Antlia","discovered":"1834","featured":false,"url":"https://spacecatalog.org/object/ngc-3271","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.82,"h_mag":8.44,"j_mag":9.12,"k_mag":8.15,"v_mag":11.73,"redshift":0.012544,"hubble_type":"S0","wikidata_id":"Q1103951","redshift_cmb":0.01362618174916097,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[16108188.73751642,16108188.73751642]},"major_axis_arcmin":3.01,"minor_axis_arcmin":1.67,"wikipedia_article":"NGC 3271","position_angle_deg":109,"surface_brightness":23.92,"radial_velocity_km_s":3737},"designations":[{"catalog":"2MASX","designation":"2MASX J10302648-3521343"},{"catalog":"ESO","designation":"ESO 375-048"},{"catalog":"ESO","designation":"ESO 375-48"},{"catalog":"ESO-LV","designation":"ESO-LV 375-0480"},{"catalog":"IC","designation":"IC 2585"},{"catalog":"LEDA","designation":"LEDA 30988"},{"catalog":"MCG","designation":"MCG -06-23-044"},{"catalog":"NGC","designation":"NGC 3271"},{"catalog":"PGC","designation":"PGC 30988"}],"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."}