{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T04:47:26.117Z","years_from_j2000":26.674,"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-3468","name":"NGC 3468","class":"lenticular_galaxy_s0","category":"galaxy","object_type":"Lenticular galaxy S0","mag":14.02,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":369393102.49953854,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":164.37987499999997,"dec_deg":40.94613888888889,"epoch_ra_deg":164.760294,"epoch_dec_deg":40.802633,"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":"Ursa Major","discovered":"1787","featured":false,"url":"https://spacecatalog.org/object/ngc-3468","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.02,"h_mag":10.18,"j_mag":10.85,"k_mag":9.89,"redshift":0.02509,"hubble_type":"S0","wikidata_id":"Q1104921","redshift_cmb":0.025936105018738553,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[20605333.035606176,20605333.035606176]},"major_axis_arcmin":1.5,"minor_axis_arcmin":0.73,"position_angle_deg":9,"surface_brightness":23.71,"radial_velocity_km_s":7427},"designations":[{"catalog":"2MASX","designation":"2MASX J10573116+4056463"},{"catalog":"LEDA","designation":"LEDA 32940"},{"catalog":"MCG","designation":"MCG +07-23-006"},{"catalog":"NGC","designation":"NGC 3468"},{"catalog":"PGC","designation":"PGC 32940"},{"catalog":"SDSS","designation":"SDSS J105731.16+405646.1"},{"catalog":"SDSS","designation":"SDSS J105731.17+405646.1"},{"catalog":"UGC","designation":"UGC 6048"}],"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."}