{"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":"2026-09-02T22:54:25.538Z","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-2863","name":"NGC 2863","class":"spiral_galaxy_sm","category":"galaxy","object_type":"Spiral galaxy Sm","mag":13.4,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":99348379.63380596,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":140.90233333333333,"dec_deg":-10.433222222222222,"epoch_ra_deg":141.228635,"epoch_dec_deg":-10.548052,"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":"1786","featured":false,"url":"https://spacecatalog.org/object/ngc-2863","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.4,"h_mag":10.97,"j_mag":11.64,"k_mag":10.8,"redshift":0.005968,"hubble_type":"Sm","wikidata_id":"Q2001469","redshift_cmb":0.0070742252924487214,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14612240.46649336,14612240.46649336]},"major_axis_arcmin":1.37,"minor_axis_arcmin":1.18,"position_angle_deg":170,"radial_velocity_km_s":1784},"designations":[{"catalog":"2MASX","designation":"2MASX J09233654-1026014"},{"catalog":"IRAS","designation":"IRAS 09211-1012"},{"catalog":"IRAS","designation":"IRAS F09211-1013"},{"catalog":"LEDA","designation":"LEDA 26609"},{"catalog":"MCG","designation":"MCG -02-24-018"},{"catalog":"NGC","designation":"NGC 2863"},{"catalog":"NGC","designation":"NGC 2869"},{"catalog":"PGC","designation":"PGC 26609"}],"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."}