{"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":"2026-09-02T22:30:32.207Z","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-2283","name":"NGC 2283","class":"spiral_galaxy_sc","category":"galaxy","object_type":"Spiral galaxy Sc","mag":12.95,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":46498117.81686494,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":101.46954166666666,"dec_deg":-18.21033333333333,"epoch_ra_deg":101.765207,"epoch_dec_deg":-18.238181,"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":"Canis Major","discovered":"1785","featured":false,"url":"https://spacecatalog.org/object/ngc-2283","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.95,"redshift":0.002808,"hubble_type":"Sc","wikidata_id":"Q1047928","redshift_cmb":0.003320385849349794,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14138167.443823857,14138167.443823857]},"major_axis_arcmin":2.76,"minor_axis_arcmin":2.01,"wikipedia_article":"NGC 2283","position_angle_deg":178,"surface_brightness":23.62,"radial_velocity_km_s":841},"designations":[{"catalog":"Cederblad","designation":"Ced 86"},{"catalog":"ESO","designation":"ESO 557-013"},{"catalog":"ESO","designation":"ESO 557-13"},{"catalog":"ESO-LV","designation":"ESO-LV 557-0130"},{"catalog":"IRAS","designation":"IRAS 06436-1809"},{"catalog":"LEDA","designation":"LEDA 19562"},{"catalog":"MCG","designation":"MCG -03-18-002"},{"catalog":"NGC","designation":"NGC 2283"},{"catalog":"PGC","designation":"PGC 19562"}],"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."}