{"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":"2026-09-03T05:07:22.188Z","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-2848","name":"NGC 2848","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":12.11,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":110975898.87548847,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":140.04095833333332,"dec_deg":-16.526055555555555,"epoch_ra_deg":140.355975,"epoch_dec_deg":-16.639428,"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":"1785","featured":false,"url":"https://spacecatalog.org/object/ngc-2848","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.45,"h_mag":9.72,"j_mag":10.2,"k_mag":9.44,"v_mag":12.11,"redshift":0.00681,"hubble_type":"SABc","wikidata_id":"Q1051285","redshift_cmb":0.007897268445270056,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14755749.780652218,14755749.780652218]},"major_axis_arcmin":2.69,"minor_axis_arcmin":2.02,"wikipedia_article":"NGC 2848","position_angle_deg":29,"surface_brightness":23.1,"radial_velocity_km_s":2034},"designations":[{"catalog":"2MASX","designation":"2MASX J09200989-1631334"},{"catalog":"IRAS","designation":"IRAS 09178-1618"},{"catalog":"IRAS","designation":"IRAS F09178-1618"},{"catalog":"LEDA","designation":"LEDA 26404"},{"catalog":"MCG","designation":"MCG -03-24-007"},{"catalog":"NGC","designation":"NGC 2848"},{"catalog":"PGC","designation":"PGC 26404"},{"catalog":"UGCA","designation":"UGCA 160"}],"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."}