{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T11:24:12.615Z","years_from_j2000":26.675,"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-4056","name":"NGC 4056","class":"elliptical_galaxy_e","category":"galaxy","object_type":"Elliptical galaxy E","mag":16.47,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":366739837.76649606,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":180.99070833333334,"dec_deg":20.3125,"epoch_ra_deg":181.334531,"epoch_dec_deg":20.162974,"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":"Coma Berenices","discovered":"1865","featured":false,"url":"https://spacecatalog.org/object/ngc-4056","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.47,"h_mag":13.06,"j_mag":13.65,"k_mag":12.93,"redshift":0.02466,"hubble_type":"E","wikidata_id":"Q1108754","redshift_cmb":0.02575327076093581,"discovered_by":"Albert Marth","ngc_type_code":"G","uncertainties":{"distance_ly":[20526941.803005733,20526941.803005733]},"major_axis_arcmin":0.63,"minor_axis_arcmin":0.53,"wikipedia_article":"NGC 4056","position_angle_deg":133,"surface_brightness":24.36,"radial_velocity_km_s":7302},"designations":[{"catalog":"2MASX","designation":"2MASX J12035771+2018449"},{"catalog":"LEDA","designation":"LEDA 38140"},{"catalog":"NGC","designation":"NGC 4056"},{"catalog":"PGC","designation":"PGC 38140"},{"catalog":"SDSS","designation":"SDSS J120357.76+201844.9"},{"catalog":"SDSS","designation":"SDSS J120357.77+201845.0"}],"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."}