{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:25:57.035Z","years_from_j2000":26.665,"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":"ic-2225","name":"IC 2225","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":14.76,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":481723390.29607415,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":121.36716666666669,"dec_deg":35.94669444444444,"epoch_ra_deg":121.80421,"epoch_dec_deg":35.87039,"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":"Lynx","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-2225","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.76,"h_mag":10.91,"j_mag":11.59,"k_mag":10.6,"redshift":0.03302,"hubble_type":"SBa","wikidata_id":"Q3692061","redshift_cmb":0.03363351290371597,"ngc_type_code":"G","uncertainties":{"distance_ly":[24125493.41821141,24125493.41821141]},"major_axis_arcmin":1.07,"minor_axis_arcmin":0.75,"position_angle_deg":87,"surface_brightness":23.49,"radial_velocity_km_s":9736},"designations":[{"catalog":"2MASX","designation":"2MASX J08052807+3556480"},{"catalog":"IC","designation":"IC 2225"},{"catalog":"LEDA","designation":"LEDA 22708"},{"catalog":"MCG","designation":"MCG +06-18-012"},{"catalog":"PGC","designation":"PGC 22708"},{"catalog":"SDSS","designation":"SDSS J080528.11+355648.0"},{"catalog":"SDSS","designation":"SDSS J080528.11+355648.1"},{"catalog":"SDSS","designation":"SDSS J080528.12+355648.1"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}