{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T19:36:50.111Z","years_from_j2000":26.654,"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-2541","name":"NGC 2541","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":11.7,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":32515939.460802313,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":123.66716666666665,"dec_deg":49.06172222222222,"epoch_ra_deg":124.155376,"epoch_dec_deg":48.980265,"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":"1788","featured":false,"url":"https://spacecatalog.org/object/ngc-2541","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":12.25,"h_mag":10.2,"j_mag":10.87,"k_mag":10.09,"v_mag":11.7,"redshift":0.001861,"hubble_type":"SABc","wikidata_id":"Q917950","redshift_cmb":0.002323692132720767,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14064045.471597904,14064045.471597904]},"major_axis_arcmin":3.02,"minor_axis_arcmin":1.6,"wikipedia_article":"NGC 2541","position_angle_deg":170,"surface_brightness":22.85,"radial_velocity_km_s":557},"designations":[{"catalog":"2MASX","designation":"2MASX J08144007+4903411"},{"catalog":"IRAS","designation":"IRAS 08110+4912"},{"catalog":"IRAS","designation":"IRAS F08109+4912"},{"catalog":"LEDA","designation":"LEDA 23110"},{"catalog":"MCG","designation":"MCG +08-15-054"},{"catalog":"NGC","designation":"NGC 2541"},{"catalog":"PGC","designation":"PGC 23110"},{"catalog":"SDSS","designation":"SDSS J081440.11+490342.1"},{"catalog":"UGC","designation":"UGC 4284"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}