{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T03:33:41.192Z","years_from_j2000":26.666,"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":"hd-67243","name":"HD 67243","class":"g1ib_yellow_supergiant","category":"star","object_type":"G1Ib yellow supergiant","mag":6.15,"mag_band":"V","abs_mag":-3.528,"abs_mag_band":"V","distance_ly":2811.6930238189525,"distance_method":"parallax","ra_deg":121.437015,"dec_deg":-33.569435,"epoch_ra_deg":121.695486,"epoch_dec_deg":-33.645667,"epoch_moved_arcsec":0.233,"pm_ra_mas_yr":-7.62,"pm_dec_mas_yr":4.24,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Puppis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-67243","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08057-3334","companions":[{"measured":2016,"magnitude":8.44,"components":"AB","discoverer_code":"HJ 4046","separation_arcsec":22.1,"position_angle_deg":88},{"measured":2015,"magnitude":10.6,"components":"AC","discoverer_code":"HJ 4046","separation_arcsec":27.9,"position_angle_deg":60}],"spectral_type":"G1Ib","color_index_bv":1.098,"luminosity_solar":2244.915507569592,"metallicity_fe_h":0.1,"radial_velocity_km_s":33,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality C)","surface_gravity_log_g":1.42,"surface_temperature_k":5134,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-7.62,"proper_motion_dec_mas_yr":4.24,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 67243"},{"catalog":"HIP","designation":"HIP 39617"},{"catalog":"HR","designation":"HR 3177"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","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."}