{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T12:51:11.943Z","years_from_j2000":26.667,"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-4182","name":"IC 4182","class":"spiral_galaxy_sm","category":"galaxy","object_type":"Spiral galaxy Sm","mag":11.61,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":196.45641666666666,"dec_deg":37.60488888888889,"epoch_ra_deg":196.769277,"epoch_dec_deg":37.461004,"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":"Canes Venatici","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-4182","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.59,"v_mag":11.61,"redshift":0.001081,"hubble_type":"Sm","wikidata_id":"Q3679560","redshift_cmb":0.0018432575881317526,"discovered_by":"Max Wolf","ngc_type_code":"G","major_axis_arcmin":6.01,"minor_axis_arcmin":5.52,"wikipedia_article":"IC 4182","position_angle_deg":0,"surface_brightness":25.09,"radial_velocity_km_s":324},"designations":[{"catalog":"IC","designation":"IC 4182"},{"catalog":"IRAS","designation":"IRAS F13035+3752"},{"catalog":"LEDA","designation":"LEDA 45314"},{"catalog":"MCG","designation":"MCG +06-29-031"},{"catalog":"PGC","designation":"PGC 45314"},{"catalog":"SDSS","designation":"SDSS J130548.70+373613.0"},{"catalog":"UGC","designation":"UGC 8188"}],"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."}