{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T19:29:51.819Z","years_from_j2000":26.67,"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-6941","name":"NGC 6941","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":14.17,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":284275195.0960514,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":309.0977916666667,"dec_deg":-4.61875,"epoch_ra_deg":309.451184,"epoch_dec_deg":-4.525907,"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":"Aquila","discovered":"1867","featured":false,"url":"https://spacecatalog.org/object/ngc-6941","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.17,"h_mag":9.98,"j_mag":10.67,"k_mag":9.73,"redshift":0.021005,"hubble_type":"Sb","wikidata_id":"Q1148675","redshift_cmb":0.020046653774343115,"discovered_by":"Édouard Stephan","ngc_type_code":"G","uncertainties":{"distance_ly":[18235234.609581552,18235234.609581552]},"major_axis_arcmin":1.73,"minor_axis_arcmin":1.2,"position_angle_deg":126,"surface_brightness":23.73,"radial_velocity_km_s":6231},"designations":[{"catalog":"2MASX","designation":"2MASX J20362345-0437078"},{"catalog":"IAU cluster","designation":"C 2033-048"},{"catalog":"IRAS","designation":"IRAS 20337-0447"},{"catalog":"LEDA","designation":"LEDA 65054"},{"catalog":"MCG","designation":"MCG -01-52-010"},{"catalog":"NGC","designation":"NGC 6941"},{"catalog":"PGC","designation":"PGC 65054"},{"catalog":"SDSS","designation":"SDSS J203623.33-043709.5"},{"catalog":"SDSS","designation":"SDSS J203623.47-043707.4"},{"catalog":"SDSS","designation":"SDSS J203623.47-043707.5"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T18:38:07.546Z","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."}