{"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":"2026-09-04T10:55:10.398Z","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-2486","name":"NGC 2486","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":13.47,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":228241555.1738099,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":119.485375,"dec_deg":25.16086111111111,"epoch_ra_deg":119.890914,"epoch_dec_deg":25.088801,"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":"Gemini","discovered":"1864","featured":false,"url":"https://spacecatalog.org/object/ngc-2486","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.32,"h_mag":10.35,"j_mag":11.09,"k_mag":10.19,"v_mag":13.47,"redshift":0.01546,"hubble_type":"SBa","wikidata_id":"Q1049316","redshift_cmb":0.01614201748808286,"discovered_by":"Albert Marth","ngc_type_code":"G","uncertainties":{"distance_ly":[16874557.949605957,16874557.949605957]},"major_axis_arcmin":1.49,"minor_axis_arcmin":0.85,"position_angle_deg":89,"surface_brightness":23.64,"radial_velocity_km_s":4599},"designations":[{"catalog":"2MASX","designation":"2MASX J07575646+2509393"},{"catalog":"LEDA","designation":"LEDA 22317"},{"catalog":"MCG","designation":"MCG +04-19-011"},{"catalog":"NGC","designation":"NGC 2486"},{"catalog":"PGC","designation":"PGC 22317"},{"catalog":"SDSS","designation":"SDSS J075756.48+250939.0"},{"catalog":"SDSS","designation":"SDSS J075756.48+250939.1"},{"catalog":"SDSS","designation":"SDSS J075756.49+250939.1"},{"catalog":"UGC","designation":"UGC 4123"}],"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."}